diff --git a/api/src/main/java/dev/xhyrom/lighteco/api/LightEco.java b/api/src/main/java/dev/xhyrom/lighteco/api/LightEco.java
index 3732b3a..451c6e7 100644
--- a/api/src/main/java/dev/xhyrom/lighteco/api/LightEco.java
+++ b/api/src/main/java/dev/xhyrom/lighteco/api/LightEco.java
@@ -16,10 +16,33 @@ public interface LightEco {
      */
     @NonNull Platform getPlatform();
 
+    /**
+     * Gets the {@link UserManager}, which manages the users.
+     *
+     * @return the user manager
+     */
     @NonNull UserManager getUserManager();
 
+    /**
+     * Gets the {@link CurrencyManager}, which manages the currencies.
+     *
+     * @return the currency manager
+     */
     @NonNull CurrencyManager getCurrencyManager();
+
+    /**
+     * Gets the {@link CommandManager}, which manages the commands.
+     *
+     * @return the command manager
+     */
     @NonNull CommandManager getCommandManager();
 
+    /**
+     * Gets the {@link PlayerAdapter} for a player class.
+     *
+     * @param playerClass the player class
+     * @return the player adapter
+     * @param <T> the player class
+     */
     <T> @NonNull PlayerAdapter<T> getPlayerAdapter(@NonNull Class<T> playerClass);
 }
diff --git a/api/src/main/java/dev/xhyrom/lighteco/api/LightEcoProvider.java b/api/src/main/java/dev/xhyrom/lighteco/api/LightEcoProvider.java
index c5bdfee..b321054 100644
--- a/api/src/main/java/dev/xhyrom/lighteco/api/LightEcoProvider.java
+++ b/api/src/main/java/dev/xhyrom/lighteco/api/LightEcoProvider.java
@@ -13,7 +13,7 @@ public final class LightEcoProvider {
         LightEco instance = LightEcoProvider.instance;
         if (instance == null) {
             throw new NotLoadedException();
-        };
+        }
 
         return instance;
     }
@@ -22,7 +22,7 @@ public final class LightEcoProvider {
     public static void set(LightEco instance) {
         if (LightEcoProvider.instance != null) {
             throw new IllegalStateException("LightEco is already loaded!");
-        };
+        }
 
         LightEcoProvider.instance = instance;
     }
diff --git a/api/src/main/java/dev/xhyrom/lighteco/api/manager/CommandManager.java b/api/src/main/java/dev/xhyrom/lighteco/api/manager/CommandManager.java
index 34c0550..9d7401f 100644
--- a/api/src/main/java/dev/xhyrom/lighteco/api/manager/CommandManager.java
+++ b/api/src/main/java/dev/xhyrom/lighteco/api/manager/CommandManager.java
@@ -5,6 +5,23 @@ import org.checkerframework.checker.nullness.qual.NonNull;
 
 public interface CommandManager {
     // Make more transparent and freedom way to do this (more abstract)
+
+    /**
+     * Registers commands for a currency.
+     *
+     * @param currency the currency to register the command for
+     */
     void registerCurrencyCommand(@NonNull Currency currency);
+
+    /**
+     * Registers commands for a currency.
+     * <p>
+     *     If main is true, the pay and balance commands will be exposed as main commands.
+     *     You can also use {@link #registerCurrencyCommand(Currency)} to register the commands as subcommands.
+     * </p>
+     *
+     * @param currency the currency to register the command for
+     * @param main if pay and balance should be exposed as main commands
+     */
     void registerCurrencyCommand(@NonNull Currency currency, boolean main);
 }
diff --git a/api/src/main/java/dev/xhyrom/lighteco/api/manager/ContextManager.java b/api/src/main/java/dev/xhyrom/lighteco/api/manager/ContextManager.java
index 6f0643f..b24ec8b 100644
--- a/api/src/main/java/dev/xhyrom/lighteco/api/manager/ContextManager.java
+++ b/api/src/main/java/dev/xhyrom/lighteco/api/manager/ContextManager.java
@@ -5,6 +5,18 @@ import org.checkerframework.checker.nullness.qual.NonNull;
 import java.util.UUID;
 
 public interface ContextManager<T> {
+    /**
+     * Gets the unique id of a player.
+     *
+     * @param context the context to get the unique id of
+     * @return the unique id of the player
+     */
     @NonNull UUID getPlayerUniqueId(@NonNull T context);
+
+    /**
+     * Gets the player class of the platform.
+     *
+     * @return the player class
+     */
     @NonNull Class<?> getPlayerClass();
 }
diff --git a/api/src/main/java/dev/xhyrom/lighteco/api/manager/CurrencyManager.java b/api/src/main/java/dev/xhyrom/lighteco/api/manager/CurrencyManager.java
index 89c0c4c..db35d2f 100644
--- a/api/src/main/java/dev/xhyrom/lighteco/api/manager/CurrencyManager.java
+++ b/api/src/main/java/dev/xhyrom/lighteco/api/manager/CurrencyManager.java
@@ -3,16 +3,42 @@ package dev.xhyrom.lighteco.api.manager;
 import dev.xhyrom.lighteco.api.model.currency.Currency;
 import dev.xhyrom.lighteco.api.model.user.User;
 import org.checkerframework.checker.nullness.qual.NonNull;
+import org.checkerframework.checker.nullness.qual.Nullable;
 
 import java.util.Collection;
 import java.util.List;
+import java.util.concurrent.CompletableFuture;
 
 public interface CurrencyManager {
+    /**
+     * Gets all registered currencies.
+     *
+     * @return a collection of all registered currencies
+     */
     @NonNull Collection<Currency> getRegisteredCurrencies();
 
-    Currency getCurrency(@NonNull String identifier);
+    /**
+     * Gets a currency by its identifier.
+     *
+     * @param identifier the identifier of the currency
+     * @return the currency, or null if not found
+     */
+    @Nullable Currency getCurrency(@NonNull String identifier);
 
+    /**
+     * Registers a currency.
+     *
+     * @param currency the currency to register
+     */
     void registerCurrency(@NonNull Currency currency);
 
-    List<User> getTopUsers(@NonNull Currency currency, int length);
+    /**
+     * Gets the top users for a currency.
+     *
+     * @implNote This method is not cached. It fetches the data from the database every time it is called.
+     * @param currency the currency to get the top users for
+     * @param length the length of the list
+     * @return a future that completes with the top users (sorted from highest to lowest balance)
+     */
+    CompletableFuture<List<User>> getTopUsers(@NonNull Currency currency, int length);
 }
diff --git a/api/src/main/java/dev/xhyrom/lighteco/api/manager/UserManager.java b/api/src/main/java/dev/xhyrom/lighteco/api/manager/UserManager.java
index 9a5d855..eb02103 100644
--- a/api/src/main/java/dev/xhyrom/lighteco/api/manager/UserManager.java
+++ b/api/src/main/java/dev/xhyrom/lighteco/api/manager/UserManager.java
@@ -13,6 +13,20 @@ public interface UserManager {
 
     @NonNull CompletableFuture<Void> saveUser(@NonNull User user);
 
+    /**
+     * Saves multiple users at once.
+     * <p>
+     *     Uses TRANSACTION clause under the hood.
+     *     If one of the users fails to save, the entire transaction will be rolled back.
+     *     This is to ensure data integrity.
+     *     If you want to save users individually, use {@link #saveUser(User)} instead.
+     * </p>
+     *
+     * @param users the users to save
+     * @return a future that completes when the users have been saved
+     */
+    @NonNull CompletableFuture<Void> saveUsers(@NonNull User... users);
+
     @Nullable User getUser(@NonNull UUID uniqueId);
 
     boolean isLoaded(@NonNull UUID uniqueId);
diff --git a/api/src/main/java/dev/xhyrom/lighteco/api/model/currency/Currency.java b/api/src/main/java/dev/xhyrom/lighteco/api/model/currency/Currency.java
index 34a19fe..8f06741 100644
--- a/api/src/main/java/dev/xhyrom/lighteco/api/model/currency/Currency.java
+++ b/api/src/main/java/dev/xhyrom/lighteco/api/model/currency/Currency.java
@@ -3,32 +3,57 @@ package dev.xhyrom.lighteco.api.model.currency;
 import dev.xhyrom.lighteco.api.model.user.User;
 
 import java.math.BigDecimal;
+import java.text.NumberFormat;
 
 public interface Currency {
-    String getIdentifier();
     /**
-     * Get the type of the currency, either {@link Type#LOCAL} or {@link Type#GLOBAL}
+     * Returns the identifier of the currency.
+     *
+     * @return the identifier
+     */
+    String getIdentifier();
+
+    /**
+     * Returns the type of the currency, either {@link Type#LOCAL} or {@link Type#GLOBAL}
      *
      * @see Type
      * @return The type of the currency
      */
     Type getType();
 
+    /**
+     * Format the given amount to a string
+     *
+     * @param amount The amount to format
+     * @return The formatted amount
+     */
+    default String format(BigDecimal amount) {
+        NumberFormat format = NumberFormat.getInstance();
+        format.setMaximumFractionDigits(fractionalDigits());
+
+        return format.format(amount);
+    }
+
+    /**
+     * Determine if this currency is payable
+     *
+     * @return `true` if this currency is payable, `false` otherwise
+     */
     boolean isPayable();
 
     /**
-     * Get the number of fractional digits this currency has
+     * Returns the number of fractional digits this currency has
      *
      * @return The number of fractional digits
      */
     default int fractionalDigits() {
         return 0;
-    };
+    }
 
     /**
-     * Get the users that have a balance in this currency
+     * Returns the default balance for this currency
      *
-     * @return The users
+     * @return The default balance
      */
     BigDecimal getDefaultBalance();
 
@@ -46,7 +71,7 @@ public interface Currency {
     /**
      * Represents the type of currency
      */
-    public enum Type {
+    enum Type {
         /**
          * A currency that is only available on a single server
          */
diff --git a/api/src/main/java/dev/xhyrom/lighteco/api/model/user/User.java b/api/src/main/java/dev/xhyrom/lighteco/api/model/user/User.java
index bf937d8..715dada 100644
--- a/api/src/main/java/dev/xhyrom/lighteco/api/model/user/User.java
+++ b/api/src/main/java/dev/xhyrom/lighteco/api/model/user/User.java
@@ -32,6 +32,10 @@ public interface User {
 
     /**
      * Set the balance of this user for the specified currency.
+     * <p>
+     *     Save the user after setting the balance using {@link dev.xhyrom.lighteco.api.manager.UserManager#saveUser(User)}. <br/>
+     *     If you're doing multiple changes, use {@link dev.xhyrom.lighteco.api.manager.UserManager#saveUsers(User...)}
+     * </p>
      *
      * @param currency the currency
      * @param balance the balance
diff --git a/api/src/main/java/dev/xhyrom/lighteco/api/platform/Platform.java b/api/src/main/java/dev/xhyrom/lighteco/api/platform/Platform.java
index a2aeee2..0a77057 100644
--- a/api/src/main/java/dev/xhyrom/lighteco/api/platform/Platform.java
+++ b/api/src/main/java/dev/xhyrom/lighteco/api/platform/Platform.java
@@ -3,6 +3,11 @@ package dev.xhyrom.lighteco.api.platform;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 public interface Platform {
+    /**
+     * Get the type of this platform.
+     *
+     * @return
+     */
     @NonNull Type getType();
 
     enum Type {
diff --git a/api/src/main/java/dev/xhyrom/lighteco/api/platform/PlayerAdapter.java b/api/src/main/java/dev/xhyrom/lighteco/api/platform/PlayerAdapter.java
index 4ceebb9..ddd8efc 100644
--- a/api/src/main/java/dev/xhyrom/lighteco/api/platform/PlayerAdapter.java
+++ b/api/src/main/java/dev/xhyrom/lighteco/api/platform/PlayerAdapter.java
@@ -6,7 +6,19 @@ import org.checkerframework.checker.nullness.qual.NonNull;
 import java.util.concurrent.CompletableFuture;
 
 public interface PlayerAdapter<T> {
+    /**
+     * Gets the user of a player.
+     *
+     * @param player the player to get the user of
+     * @return the user
+     */
     @NonNull User getUser(@NonNull T player);
 
+    /**
+     * Loads the user of a player.
+     *
+     * @param player the player to load the user of
+     * @return a future that completes with the user
+     */
     @NonNull CompletableFuture<User> loadUser(@NonNull T player);
 }
diff --git a/api/src/main/java/dev/xhyrom/lighteco/api/storage/StorageProvider.java b/api/src/main/java/dev/xhyrom/lighteco/api/storage/StorageProvider.java
index 2bedb77..fbc7732 100644
--- a/api/src/main/java/dev/xhyrom/lighteco/api/storage/StorageProvider.java
+++ b/api/src/main/java/dev/xhyrom/lighteco/api/storage/StorageProvider.java
@@ -1,15 +1,31 @@
 package dev.xhyrom.lighteco.api.storage;
 
+import dev.xhyrom.lighteco.api.model.currency.Currency;
 import dev.xhyrom.lighteco.api.model.user.User;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
+import java.util.List;
 import java.util.UUID;
 
 public interface StorageProvider {
+    /**
+     * Initialize the storage provider.
+     *
+     * @throws Exception
+     */
     void init() throws Exception;
+
+    /**
+     * Shutdown the storage provider.
+     *
+     * @throws Exception
+     */
     void shutdown() throws Exception;
 
     @NonNull User loadUser(@NonNull UUID uniqueId, @Nullable String username) throws Exception;
     void saveUser(@NonNull User user) throws Exception;
+    void saveUsers(@NonNull User... users) throws Exception;
+
+    @NonNull List<User> getTopUsers(Currency currency, int length) throws Exception;
 }
diff --git a/bukkittest/src/main/java/dev/xhyrom/lighteco/bukkittest/TestCurrency2.java b/bukkittest/src/main/java/dev/xhyrom/lighteco/bukkittest/TestCurrency2.java
index 2b961ac..63de38a 100644
--- a/bukkittest/src/main/java/dev/xhyrom/lighteco/bukkittest/TestCurrency2.java
+++ b/bukkittest/src/main/java/dev/xhyrom/lighteco/bukkittest/TestCurrency2.java
@@ -18,7 +18,7 @@ public class TestCurrency2 implements Currency {
 
     @Override
     public boolean isPayable() {
-        return false;
+        return true;
     }
 
     @Override
diff --git a/bukkittest/src/main/java/dev/xhyrom/lighteco/bukkittest/TestPlugin.java b/bukkittest/src/main/java/dev/xhyrom/lighteco/bukkittest/TestPlugin.java
index f98d847..45f5d96 100644
--- a/bukkittest/src/main/java/dev/xhyrom/lighteco/bukkittest/TestPlugin.java
+++ b/bukkittest/src/main/java/dev/xhyrom/lighteco/bukkittest/TestPlugin.java
@@ -3,9 +3,17 @@ package dev.xhyrom.lighteco.bukkittest;
 import dev.xhyrom.lighteco.api.LightEco;
 import dev.xhyrom.lighteco.api.LightEcoProvider;
 import dev.xhyrom.lighteco.api.manager.CurrencyManager;
+import dev.xhyrom.lighteco.api.model.user.User;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.AsyncPlayerChatEvent;
+import org.bukkit.event.player.PlayerChatEvent;
 import org.bukkit.plugin.java.JavaPlugin;
 
-public class TestPlugin extends JavaPlugin {
+import java.util.List;
+import java.util.concurrent.CompletableFuture;
+
+public class TestPlugin extends JavaPlugin implements Listener {
     @Override
     public void onEnable() {
         getLogger().info("TestPlugin loaded!");
@@ -15,6 +23,7 @@ public class TestPlugin extends JavaPlugin {
 
         currencyManager.registerCurrency(new TestCurrency());
         currencyManager.registerCurrency(new TestCurrency2());
+        getServer().getPluginManager().registerEvents(this, this);
 
         getLogger().info("TestCurrency registered!");
 
@@ -23,4 +32,15 @@ public class TestPlugin extends JavaPlugin {
         provider.getCommandManager().registerCurrencyCommand(currencyManager.getCurrency("test"));
         provider.getCommandManager().registerCurrencyCommand(currencyManager.getCurrency("test2"));
     }
+
+    @EventHandler
+    public void onChat(AsyncPlayerChatEvent event) {
+        LightEco provider = LightEcoProvider.get();
+        CurrencyManager currencyManager = provider.getCurrencyManager();
+        CompletableFuture<List<User>> topusers = currencyManager.getTopUsers(currencyManager.getCurrency("money"), 5);
+
+        for (User user : topusers.join()) {
+            event.getPlayer().sendMessage(user.getUniqueId() + " ("+ user.getUsername() +") " + ": " + user.getBalance(currencyManager.getCurrency("money")));
+        }
+    }
 }
diff --git a/common/src/main/java/dev/xhyrom/lighteco/common/api/impl/ApiCurrencyManager.java b/common/src/main/java/dev/xhyrom/lighteco/common/api/impl/ApiCurrencyManager.java
index 4f19d76..8ed1e56 100644
--- a/common/src/main/java/dev/xhyrom/lighteco/common/api/impl/ApiCurrencyManager.java
+++ b/common/src/main/java/dev/xhyrom/lighteco/common/api/impl/ApiCurrencyManager.java
@@ -8,7 +8,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
 
 import java.util.Collection;
 import java.util.List;
-import java.util.stream.Collectors;
+import java.util.concurrent.CompletableFuture;
 
 public class ApiCurrencyManager extends ApiAbstractManager<dev.xhyrom.lighteco.common.manager.currency.CurrencyManager> implements CurrencyManager {
     public ApiCurrencyManager(LightEcoPlugin plugin, dev.xhyrom.lighteco.common.manager.currency.CurrencyManager handler) {
@@ -38,10 +38,8 @@ public class ApiCurrencyManager extends ApiAbstractManager<dev.xhyrom.lighteco.c
     }
 
     @Override
-    public List<User> getTopUsers(@NonNull Currency currency, int length) {
+    public CompletableFuture<List<User>> getTopUsers(@NonNull Currency currency, int length) {
         dev.xhyrom.lighteco.common.model.currency.Currency internal = this.handler.getIfLoaded(currency.getIdentifier());
-        return this.handler.getTopUsers(internal, length)
-                .stream().map(dev.xhyrom.lighteco.common.model.user.User::getProxy)
-                .collect(Collectors.toList());
+        return this.handler.getTopUsers(internal, length);
     }
 }
diff --git a/common/src/main/java/dev/xhyrom/lighteco/common/api/impl/ApiUserManager.java b/common/src/main/java/dev/xhyrom/lighteco/common/api/impl/ApiUserManager.java
index 4c0a495..91915d2 100644
--- a/common/src/main/java/dev/xhyrom/lighteco/common/api/impl/ApiUserManager.java
+++ b/common/src/main/java/dev/xhyrom/lighteco/common/api/impl/ApiUserManager.java
@@ -5,6 +5,7 @@ import dev.xhyrom.lighteco.api.model.user.User;
 import dev.xhyrom.lighteco.common.plugin.LightEcoPlugin;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.UUID;
 import java.util.concurrent.CompletableFuture;
@@ -34,6 +35,11 @@ public class ApiUserManager extends ApiAbstractManager<dev.xhyrom.lighteco.commo
         return this.plugin.getStorage().saveUser(user);
     }
 
+    @Override
+    public @NonNull CompletableFuture<Void> saveUsers(@NotNull @NonNull User... users) {
+        return this.plugin.getStorage().saveUsers(users);
+    }
+
     @Override
     public @Nullable User getUser(@NonNull UUID uniqueId) {
         return wrap(this.handler.getIfLoaded(uniqueId));
diff --git a/common/src/main/java/dev/xhyrom/lighteco/common/config/message/CurrencyMessageConfig.java b/common/src/main/java/dev/xhyrom/lighteco/common/config/message/CurrencyMessageConfig.java
index 4f48fea..3bc4c4b 100644
--- a/common/src/main/java/dev/xhyrom/lighteco/common/config/message/CurrencyMessageConfig.java
+++ b/common/src/main/java/dev/xhyrom/lighteco/common/config/message/CurrencyMessageConfig.java
@@ -12,13 +12,10 @@ public class CurrencyMessageConfig extends OkaeriConfig {
     public String give = "<currency> <dark_gray>| <gray>Gave <gold><target> <gold><amount> <dark_gray>| <gold><balance>";
     public String take = "<currency> <dark_gray>| <gray>Took <gold><amount> <yellow>from <gold><target>";
 
-    public String pay = "<currency> <dark_gray>| <gray>Paid <gold><amount> <yellow>to <gold><target> <dark_gray>(<gold><taxed_amount> <yellow>after tax)</gray>";
+    public String pay = "<currency> <dark_gray>| <gray>Paid <gold><amount> <yellow>to <gold><target>";
+    public String payWithTax = "<currency> <dark_gray>| <gray>Paid <gold><amount> <yellow>to <gold><target> <dark_gray>(<gold><taxed_amount> <yellow>after tax<dark_gray>)";
 
     public String wait = "<red>Please wait a moment before using this command again.";
     public String notEnoughMoney = "<red>You don't have enough money!";
-    public String cannotSetNegative = "<red>Cannot set negative money!";
-    public String cannotGiveNegative = "<red>Cannot give negative money!";
-    public String cannotTakeNegative = "<red>Cannot take negative money!";
-    public String cannotPayNegative = "<red>Cannot pay negative money!";
     public String cannotPaySelf = "<red>You cannot pay yourself!";
 }
diff --git a/common/src/main/java/dev/xhyrom/lighteco/common/config/storage/StorageDataConfig.java b/common/src/main/java/dev/xhyrom/lighteco/common/config/storage/StorageDataConfig.java
index 0ff6d3c..614eef6 100644
--- a/common/src/main/java/dev/xhyrom/lighteco/common/config/storage/StorageDataConfig.java
+++ b/common/src/main/java/dev/xhyrom/lighteco/common/config/storage/StorageDataConfig.java
@@ -13,4 +13,19 @@ public class StorageDataConfig extends OkaeriConfig {
     @Comment("Credentials for connecting to the database.")
     public String username = "root";
     public String password = "password";
+
+    @Comment("Maximum number of connections in the pool.")
+    public int maximumPoolSize = 10;
+
+    @Comment("Minimum idle connections in the pool.")
+    public int minimumIdle = 5;
+
+    @Comment("Maximum lifetime of a connection in the pool.")
+    public long maxLifetime = 1800000;
+
+    @Comment("Keep alive interval in milliseconds.")
+    public long keepAliveTime = 0;
+
+    @Comment("Connection timeout in milliseconds.")
+    public long connectionTimeout = 5000;
 }
diff --git a/common/src/main/java/dev/xhyrom/lighteco/common/manager/ConcurrentManager.java b/common/src/main/java/dev/xhyrom/lighteco/common/manager/ConcurrentManager.java
new file mode 100644
index 0000000..530bcf6
--- /dev/null
+++ b/common/src/main/java/dev/xhyrom/lighteco/common/manager/ConcurrentManager.java
@@ -0,0 +1,39 @@
+package dev.xhyrom.lighteco.common.manager;
+
+import java.util.Collection;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+public abstract class ConcurrentManager<I, T> implements Manager<I, T> {
+    public final Map<I, T> map = new ConcurrentHashMap<>();
+
+    @Override
+    public Collection<I> keys() {
+        return this.map.keySet();
+    }
+
+    @Override
+    public Collection<T> values() {
+        return this.map.values();
+    }
+
+    @Override
+    public T getOrMake(I identifier) {
+        return this.map.computeIfAbsent(identifier, this::apply);
+    }
+
+    @Override
+    public T getIfLoaded(I identifier) {
+        return this.map.get(identifier);
+    }
+
+    @Override
+    public boolean isLoaded(I identifier) {
+        return this.map.containsKey(identifier);
+    }
+
+    @Override
+    public void unload(I identifier) {
+        this.map.remove(identifier);
+    }
+}
diff --git a/common/src/main/java/dev/xhyrom/lighteco/common/manager/Manager.java b/common/src/main/java/dev/xhyrom/lighteco/common/manager/Manager.java
index 3b20cb8..7734c22 100644
--- a/common/src/main/java/dev/xhyrom/lighteco/common/manager/Manager.java
+++ b/common/src/main/java/dev/xhyrom/lighteco/common/manager/Manager.java
@@ -15,6 +15,4 @@ public interface Manager<I, T> {
     boolean isLoaded(I identifier);
 
     void unload(I identifier);
-
-    void unload(Collection<I> identifiers);
 }
diff --git a/common/src/main/java/dev/xhyrom/lighteco/common/manager/AbstractManager.java b/common/src/main/java/dev/xhyrom/lighteco/common/manager/SingleManager.java
similarity index 80%
rename from common/src/main/java/dev/xhyrom/lighteco/common/manager/AbstractManager.java
rename to common/src/main/java/dev/xhyrom/lighteco/common/manager/SingleManager.java
index 024b202..528e637 100644
--- a/common/src/main/java/dev/xhyrom/lighteco/common/manager/AbstractManager.java
+++ b/common/src/main/java/dev/xhyrom/lighteco/common/manager/SingleManager.java
@@ -4,7 +4,7 @@ import java.util.Collection;
 import java.util.HashMap;
 import java.util.Map;
 
-public abstract class AbstractManager<I, T> implements Manager<I, T> {
+public abstract class SingleManager<I, T> implements Manager<I, T> {
     public final Map<I, T> map = new HashMap<>();
 
     @Override
@@ -36,9 +36,4 @@ public abstract class AbstractManager<I, T> implements Manager<I, T> {
     public void unload(I identifier) {
         this.map.remove(identifier);
     }
-
-    @Override
-    public void unload(Collection<I> identifiers) {
-        identifiers.forEach(this::unload);
-    }
 }
diff --git a/common/src/main/java/dev/xhyrom/lighteco/common/manager/command/AbstractCommandManager.java b/common/src/main/java/dev/xhyrom/lighteco/common/manager/command/AbstractCommandManager.java
index f48cc80..2a815a1 100644
--- a/common/src/main/java/dev/xhyrom/lighteco/common/manager/command/AbstractCommandManager.java
+++ b/common/src/main/java/dev/xhyrom/lighteco/common/manager/command/AbstractCommandManager.java
@@ -13,7 +13,6 @@ import java.math.RoundingMode;
 import java.util.ArrayList;
 import java.util.Map;
 import java.util.UUID;
-import java.util.concurrent.CompletableFuture;
 
 public abstract class AbstractCommandManager implements CommandManager {
     public final LightEcoPlugin plugin;
@@ -102,16 +101,7 @@ public abstract class AbstractCommandManager implements CommandManager {
         addToMustWait(sender.getUniqueId(), target.getUniqueId());
         amount = amount.setScale(currency.getProxy().fractionalDigits(), RoundingMode.DOWN);
 
-        try {
-            target.setBalance(currency, amount);
-        } catch (IllegalArgumentException e) {
-            sender.sendMessage(
-                    miniMessage.deserialize(this.getConfig(currency).cannotSetNegative)
-            );
-
-            removeFromMustWait(target.getUniqueId(), sender.getUniqueId());
-            return;
-        }
+        target.setBalance(currency, amount);
 
         sender.sendMessage(
                 miniMessage.deserialize(
@@ -131,16 +121,7 @@ public abstract class AbstractCommandManager implements CommandManager {
         addToMustWait(sender.getUniqueId(), target.getUniqueId());
         amount = amount.setScale(currency.getProxy().fractionalDigits(), RoundingMode.DOWN);
 
-        try {
-            target.deposit(currency, amount);
-        } catch (IllegalArgumentException e) {
-            sender.sendMessage(
-                    miniMessage.deserialize(this.getConfig(currency).cannotGiveNegative)
-            );
-
-            removeFromMustWait(target.getUniqueId(), sender.getUniqueId());
-            return;
-        }
+        target.deposit(currency, amount);
 
         sender.sendMessage(
                 miniMessage.deserialize(
@@ -161,16 +142,7 @@ public abstract class AbstractCommandManager implements CommandManager {
         addToMustWait(sender.getUniqueId(), target.getUniqueId());
         amount = amount.setScale(currency.getProxy().fractionalDigits(), RoundingMode.DOWN);
 
-        try {
-            target.withdraw(currency, amount);
-        } catch (IllegalArgumentException e) {
-            sender.sendMessage(
-                    miniMessage.deserialize(this.getConfig(currency).cannotTakeNegative)
-            );
-
-            removeFromMustWait(target.getUniqueId(), sender.getUniqueId());
-            return;
-        }
+        target.withdraw(currency, amount);
 
         sender.sendMessage(
                 miniMessage.deserialize(
@@ -196,14 +168,6 @@ public abstract class AbstractCommandManager implements CommandManager {
             return;
         }
 
-        if (amount.compareTo(BigDecimal.ZERO) < 0) {
-            sender.sendMessage(
-                    miniMessage.deserialize(this.getConfig(currency).cannotPayNegative)
-            );
-
-            return;
-        }
-
         amount = amount.setScale(currency.getProxy().fractionalDigits(), RoundingMode.DOWN);
 
         User user = this.plugin.getUserManager().getIfLoaded(sender.getUniqueId());
@@ -220,6 +184,7 @@ public abstract class AbstractCommandManager implements CommandManager {
 
         // calculate tax using Currency#calculateTax
         BigDecimal tax = currency.getProxy().calculateTax(user.getProxy(), amount);
+        tax = tax.setScale(currency.getProxy().fractionalDigits(), RoundingMode.DOWN);
 
         // subtract tax from amount
         BigDecimal taxedAmount = amount.subtract(tax);
@@ -227,9 +192,14 @@ public abstract class AbstractCommandManager implements CommandManager {
         target.deposit(currency, taxedAmount);
         user.withdraw(currency, amount);
 
+        String template = tax.compareTo(BigDecimal.ZERO) > 0
+                ? this.getConfig(currency).payWithTax
+                : this.getConfig(currency).pay;
+
+
         sender.sendMessage(
                 miniMessage.deserialize(
-                        this.getConfig(currency).pay,
+                        template,
                         Placeholder.parsed("currency", currency.getIdentifier()),
                         Placeholder.parsed("target", target.getUsername()),
                         Placeholder.parsed("amount", amount.toPlainString()),
@@ -239,9 +209,7 @@ public abstract class AbstractCommandManager implements CommandManager {
                 )
         );
 
-        CompletableFuture.allOf(
-                this.plugin.getUserManager().saveUser(user),
-                this.plugin.getUserManager().saveUser(target)
-        ).thenAccept(v -> removeFromMustWait(sender.getUniqueId(), target.getUniqueId()));
+        this.plugin.getUserManager().saveUsers(user, target)
+                        .thenAccept(v -> removeFromMustWait(sender.getUniqueId(), target.getUniqueId()));
     }
 }
diff --git a/common/src/main/java/dev/xhyrom/lighteco/common/manager/currency/CurrencyManager.java b/common/src/main/java/dev/xhyrom/lighteco/common/manager/currency/CurrencyManager.java
index 632c2e1..350669f 100644
--- a/common/src/main/java/dev/xhyrom/lighteco/common/manager/currency/CurrencyManager.java
+++ b/common/src/main/java/dev/xhyrom/lighteco/common/manager/currency/CurrencyManager.java
@@ -1,17 +1,18 @@
 package dev.xhyrom.lighteco.common.manager.currency;
 
+import dev.xhyrom.lighteco.api.model.user.User;
 import dev.xhyrom.lighteco.common.manager.Manager;
 import dev.xhyrom.lighteco.common.model.currency.Currency;
-import dev.xhyrom.lighteco.common.model.user.User;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 import java.util.Collection;
 import java.util.List;
+import java.util.concurrent.CompletableFuture;
 
 public interface CurrencyManager extends Manager<String, Currency> {
     @NonNull Collection<Currency> getRegisteredCurrencies();
 
     void registerCurrency(@NonNull Currency currency);
 
-    List<User> getTopUsers(@NonNull Currency currency, int length);
+    CompletableFuture<List<User>> getTopUsers(@NonNull Currency currency, int length);
 }
diff --git a/common/src/main/java/dev/xhyrom/lighteco/common/manager/currency/StandardCurrencyManager.java b/common/src/main/java/dev/xhyrom/lighteco/common/manager/currency/StandardCurrencyManager.java
index 2064c5d..1577d11 100644
--- a/common/src/main/java/dev/xhyrom/lighteco/common/manager/currency/StandardCurrencyManager.java
+++ b/common/src/main/java/dev/xhyrom/lighteco/common/manager/currency/StandardCurrencyManager.java
@@ -1,15 +1,16 @@
 package dev.xhyrom.lighteco.common.manager.currency;
 
-import dev.xhyrom.lighteco.common.manager.AbstractManager;
+import dev.xhyrom.lighteco.api.model.user.User;
+import dev.xhyrom.lighteco.common.manager.SingleManager;
 import dev.xhyrom.lighteco.common.model.currency.Currency;
-import dev.xhyrom.lighteco.common.model.user.User;
 import dev.xhyrom.lighteco.common.plugin.LightEcoPlugin;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 import java.util.Collection;
 import java.util.List;
+import java.util.concurrent.CompletableFuture;
 
-public class StandardCurrencyManager extends AbstractManager<String, Currency> implements CurrencyManager {
+public class StandardCurrencyManager extends SingleManager<String, Currency> implements CurrencyManager {
     private final LightEcoPlugin plugin;
 
     public StandardCurrencyManager(LightEcoPlugin plugin) {
@@ -18,7 +19,7 @@ public class StandardCurrencyManager extends AbstractManager<String, Currency> i
 
     @Override
     public Currency apply(String identifier) {
-        return null;
+        throw new UnsupportedOperationException();
     }
 
     @Override
@@ -39,9 +40,8 @@ public class StandardCurrencyManager extends AbstractManager<String, Currency> i
         this.map.put(currency.getIdentifier(), currency);
     }
 
-    // TODO: finish
     @Override
-    public List<User> getTopUsers(@NonNull Currency currency, int length) {
-        return null;
+    public CompletableFuture<List<User>> getTopUsers(@NonNull Currency currency, int length) {
+        return this.plugin.getStorage().getTopUsers(currency.getProxy(), length);
     }
 }
diff --git a/common/src/main/java/dev/xhyrom/lighteco/common/manager/user/StandardUserManager.java b/common/src/main/java/dev/xhyrom/lighteco/common/manager/user/StandardUserManager.java
index dc61424..3735de0 100644
--- a/common/src/main/java/dev/xhyrom/lighteco/common/manager/user/StandardUserManager.java
+++ b/common/src/main/java/dev/xhyrom/lighteco/common/manager/user/StandardUserManager.java
@@ -1,15 +1,14 @@
 package dev.xhyrom.lighteco.common.manager.user;
 
-import dev.xhyrom.lighteco.common.manager.AbstractManager;
+import dev.xhyrom.lighteco.common.manager.ConcurrentManager;
 import dev.xhyrom.lighteco.common.model.user.User;
 import dev.xhyrom.lighteco.common.plugin.LightEcoPlugin;
 
-import java.util.HashSet;
-import java.util.Set;
+import java.util.Arrays;
 import java.util.UUID;
 import java.util.concurrent.CompletableFuture;
 
-public class StandardUserManager extends AbstractManager<UUID, User> implements UserManager {
+public class StandardUserManager extends ConcurrentManager<UUID, User> implements UserManager {
     private final LightEcoPlugin plugin;
 
     public StandardUserManager(LightEcoPlugin plugin) {
@@ -31,23 +30,17 @@ public class StandardUserManager extends AbstractManager<UUID, User> implements
         return this.plugin.getStorage().loadUser(uniqueId, username);
     }
 
-    @Override
-    public CompletableFuture<Void> load() {
-        Set<UUID> uniqueIds = new HashSet<>(keys());
-        uniqueIds.addAll(this.plugin.getBootstrap().getOnlinePlayers());
-
-        return uniqueIds.stream()
-                .map(id -> this.plugin.getStorage().loadUser(id))
-                .collect(CompletableFuture::allOf, (future, userFuture) -> future.join(), (future, userFuture) -> future.join());
-    }
-
     @Override
     public CompletableFuture<Void> saveUser(User user) {
        return this.plugin.getStorage().saveUser(user.getProxy());
     }
 
     @Override
-    public void invalidateCaches() {
-        values().forEach(User::invalidateCaches);
+    public CompletableFuture<Void> saveUsers(User... users) {
+        return this.plugin.getStorage().saveUsers(
+                Arrays.stream(users)
+                        .map(User::getProxy)
+                        .toArray(dev.xhyrom.lighteco.api.model.user.User[]::new)
+        );
     }
 }
\ No newline at end of file
diff --git a/common/src/main/java/dev/xhyrom/lighteco/common/manager/user/UserManager.java b/common/src/main/java/dev/xhyrom/lighteco/common/manager/user/UserManager.java
index 917f91a..b5cb08c 100644
--- a/common/src/main/java/dev/xhyrom/lighteco/common/manager/user/UserManager.java
+++ b/common/src/main/java/dev/xhyrom/lighteco/common/manager/user/UserManager.java
@@ -8,11 +8,8 @@ import java.util.concurrent.CompletableFuture;
 
 public interface UserManager extends Manager<UUID, User> {
     CompletableFuture<Void> saveUser(User user);
-
-    CompletableFuture<Void> load();
+    CompletableFuture<Void> saveUsers(User... users);
 
     CompletableFuture<User> loadUser(UUID uniqueId);
     CompletableFuture<User> loadUser(UUID uniqueId, String username);
-
-    void invalidateCaches();
 }
diff --git a/common/src/main/java/dev/xhyrom/lighteco/common/storage/Storage.java b/common/src/main/java/dev/xhyrom/lighteco/common/storage/Storage.java
index d9c82e9..18a0b06 100644
--- a/common/src/main/java/dev/xhyrom/lighteco/common/storage/Storage.java
+++ b/common/src/main/java/dev/xhyrom/lighteco/common/storage/Storage.java
@@ -5,6 +5,8 @@ import dev.xhyrom.lighteco.api.storage.StorageProvider;
 import dev.xhyrom.lighteco.common.plugin.LightEcoPlugin;
 import dev.xhyrom.lighteco.common.util.ThrowableRunnable;
 
+import java.util.ArrayList;
+import java.util.List;
 import java.util.UUID;
 import java.util.concurrent.Callable;
 import java.util.concurrent.CompletableFuture;
@@ -80,4 +82,14 @@ public class Storage {
     public CompletableFuture<Void> saveUser(dev.xhyrom.lighteco.api.model.user.User user) {
         return future(() -> this.provider.saveUser(user));
     }
+
+    public CompletableFuture<Void> saveUsers(dev.xhyrom.lighteco.api.model.user.User... users) {
+        return future(() -> this.provider.saveUsers(users));
+    }
+
+    // Return ApiUser instead of User
+    // We don't do anything with this
+    public CompletableFuture<List<dev.xhyrom.lighteco.api.model.user.User>> getTopUsers(dev.xhyrom.lighteco.api.model.currency.Currency currency, int length) {
+        return future(() -> this.provider.getTopUsers(currency, length));
+    }
 }
diff --git a/common/src/main/java/dev/xhyrom/lighteco/common/storage/provider/memory/MemoryStorageProvider.java b/common/src/main/java/dev/xhyrom/lighteco/common/storage/provider/memory/MemoryStorageProvider.java
index 3337af6..607c99b 100644
--- a/common/src/main/java/dev/xhyrom/lighteco/common/storage/provider/memory/MemoryStorageProvider.java
+++ b/common/src/main/java/dev/xhyrom/lighteco/common/storage/provider/memory/MemoryStorageProvider.java
@@ -1,12 +1,17 @@
 package dev.xhyrom.lighteco.common.storage.provider.memory;
 
+import dev.xhyrom.lighteco.api.model.currency.Currency;
 import dev.xhyrom.lighteco.api.model.user.User;
 import dev.xhyrom.lighteco.api.storage.StorageProvider;
 import dev.xhyrom.lighteco.common.plugin.LightEcoPlugin;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
+import org.jetbrains.annotations.NotNull;
 
+import java.math.BigDecimal;
 import java.util.HashMap;
+import java.util.List;
+import java.util.Set;
 import java.util.UUID;
 
 public class MemoryStorageProvider implements StorageProvider {
@@ -41,6 +46,23 @@ public class MemoryStorageProvider implements StorageProvider {
         this.userDatabase.put(user.getUniqueId(), user);
     }
 
+    @Override
+    public void saveUsers(@NotNull @NonNull User... users) {
+        for (User user : users) {
+            this.userDatabase.put(user.getUniqueId(), user);
+        }
+    }
+
+    @Override
+    public @NonNull List<User> getTopUsers(Currency currency, int length) throws Exception {
+        return userDatabase.values().stream().sorted((user1, user2) -> {
+            BigDecimal balance1 = user1.getBalance(currency);
+            BigDecimal balance2 = user2.getBalance(currency);
+
+            return balance1.compareTo(balance2);
+        }).limit(length).toList();
+    }
+
     private User createUser(UUID uniqueId, String username, User data) {
         dev.xhyrom.lighteco.common.model.user.User user = this.plugin.getUserManager().getOrMake(uniqueId);
         if (username != null)
diff --git a/common/src/main/java/dev/xhyrom/lighteco/common/storage/provider/sql/SqlStatements.java b/common/src/main/java/dev/xhyrom/lighteco/common/storage/provider/sql/SqlStatements.java
index 14bdb40..572221a 100644
--- a/common/src/main/java/dev/xhyrom/lighteco/common/storage/provider/sql/SqlStatements.java
+++ b/common/src/main/java/dev/xhyrom/lighteco/common/storage/provider/sql/SqlStatements.java
@@ -19,7 +19,7 @@ public enum SqlStatements {
             "SELECT currency_identifier, balance FROM ( SELECT currency_identifier, balance FROM '{prefix}_users' WHERE uuid = ?1 UNION ALL SELECT currency_identifier, balance FROM '{prefix}_{context}_users' WHERE uuid = ?1 ) AS combined_currencies;",
             "SELECT currency_identifier, balance FROM ( SELECT currency_identifier, balance FROM '{prefix}_users' WHERE uuid = ?1 UNION ALL SELECT currency_identifier, balance FROM '{prefix}_{context}_users' WHERE uuid = ?1 ) AS combined_currencies;",
             "SELECT currency_identifier, balance FROM ( SELECT currency_identifier, balance FROM '{prefix}_users' WHERE uuid = ? UNION ALL SELECT currency_identifier, balance FROM '{prefix}_{context}_users' WHERE uuid = ? ) AS combined_currencies;",
-            null
+            null // same as mariadb
     );
 
     public final String sqlite;
diff --git a/common/src/main/java/dev/xhyrom/lighteco/common/storage/provider/sql/SqlStorageProvider.java b/common/src/main/java/dev/xhyrom/lighteco/common/storage/provider/sql/SqlStorageProvider.java
index c2aedfd..42d11d5 100644
--- a/common/src/main/java/dev/xhyrom/lighteco/common/storage/provider/sql/SqlStorageProvider.java
+++ b/common/src/main/java/dev/xhyrom/lighteco/common/storage/provider/sql/SqlStorageProvider.java
@@ -8,11 +8,13 @@ import dev.xhyrom.lighteco.common.storage.StorageType;
 import dev.xhyrom.lighteco.common.storage.provider.sql.connection.ConnectionFactory;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
+import org.jetbrains.annotations.NotNull;
 
 import java.io.IOException;
 import java.io.InputStream;
 import java.math.BigDecimal;
 import java.sql.*;
+import java.util.ArrayList;
 import java.util.List;
 import java.util.UUID;
 import java.util.function.Function;
@@ -21,7 +23,9 @@ public class SqlStorageProvider implements StorageProvider {
     private static String SAVE_USER_LOCAL_CURRENCY;
     private static String SAVE_USER_GLOBAL_CURRENCY;
     private static String LOAD_WHOLE_USER;
-    
+    private static final String GET_TOP_X_USERS_LOCAL = "SELECT uuid, balance FROM {prefix}_{context}_users WHERE currency_identifier = ? ORDER BY balance DESC LIMIT ?;";
+    private static final String GET_TOP_X_USERS_GLOBAL = "SELECT uuid, balance FROM {prefix}_users WHERE currency_identifier = ? ORDER BY balance DESC LIMIT ?;";
+
     private final LightEcoPlugin plugin;
     private final ConnectionFactory connectionFactory;
     private final Function<String, String> statementProcessor;
@@ -109,37 +113,103 @@ public class SqlStorageProvider implements StorageProvider {
             try (PreparedStatement psGlobal = c.prepareStatement(this.statementProcessor.apply(SAVE_USER_GLOBAL_CURRENCY));
                  PreparedStatement psLocal = c.prepareStatement(this.statementProcessor.apply(SAVE_USER_LOCAL_CURRENCY))) {
 
-                for (Currency currency : this.plugin.getCurrencyManager().getRegisteredCurrencies()) {
-                    BigDecimal balance = user.getBalance(currency.getProxy());
-
-                    if (balance.compareTo(BigDecimal.ZERO) == 0) continue;
-
-                    switch (currency.getType()) {
-                        case GLOBAL -> {
-                            psGlobal.setString(1, uniqueIdString);
-                            psGlobal.setString(2, currency.getIdentifier());
-                            psGlobal.setBigDecimal(3, balance);
-                            if (SqlStatements.mustDuplicateParameters(this.connectionFactory.getImplementationName()))
-                                psGlobal.setBigDecimal(4, balance);
-
-                            psGlobal.addBatch();
-                        }
-                        case LOCAL -> {
-                            psLocal.setString(1, uniqueIdString);
-                            psLocal.setString(2, currency.getIdentifier());
-                            psLocal.setBigDecimal(3, balance);
-                            if (SqlStatements.mustDuplicateParameters(this.connectionFactory.getImplementationName()))
-                                psLocal.setBigDecimal(4, balance);
-
-                            psLocal.addBatch();
-                        }
-                    }
-                }
+                saveBalances(psGlobal, psLocal, user, uniqueIdString);
 
                 psGlobal.executeBatch();
                 psLocal.executeBatch();
             } catch (SQLException e) {
-                throw new RuntimeException("Failed to save user " + user.getUniqueId(), e);
+                throw new SQLException("Failed to save user " + user.getUniqueId(), e);
+            }
+        }
+    }
+
+    @Override
+    public void saveUsers(@NotNull @NonNull User... users) throws Exception {
+        // use transaction
+        try (Connection c = this.connectionFactory.getConnection()) {
+            try {
+                c.setAutoCommit(false);
+
+                try (PreparedStatement psGlobal = c.prepareStatement(this.statementProcessor.apply(SAVE_USER_GLOBAL_CURRENCY));
+                     PreparedStatement psLocal = c.prepareStatement(this.statementProcessor.apply(SAVE_USER_LOCAL_CURRENCY))) {
+
+                    for (User user : users) {
+                        String uniqueIdString = user.getUniqueId().toString();
+
+                        saveBalances(psGlobal, psLocal, user, uniqueIdString);
+                    }
+
+                    psGlobal.executeBatch();
+                    psLocal.executeBatch();
+                } catch (SQLException e) {
+                    throw new SQLException("Failed to save users", e);
+                }
+
+                c.commit();
+            } catch (SQLException e) {
+                c.rollback();
+                throw e;
+            }
+        }
+    }
+
+    @Override
+    public @NonNull List<User> getTopUsers(dev.xhyrom.lighteco.api.model.currency.Currency apiCurrency, int length) throws Exception {
+        Currency currency = this.plugin.getCurrencyManager().getIfLoaded(apiCurrency.getIdentifier());
+        String statement = currency.getType() == dev.xhyrom.lighteco.api.model.currency.Currency.Type.GLOBAL
+                ? GET_TOP_X_USERS_GLOBAL
+                : GET_TOP_X_USERS_LOCAL;
+
+        try (Connection c = this.connectionFactory.getConnection()) {
+            try (PreparedStatement ps = c.prepareStatement(this.statementProcessor.apply(statement))) {
+                ps.setString(1, currency.getIdentifier());
+                ps.setInt(2, length);
+
+                ResultSet rs = ps.executeQuery();
+
+                List<User> users = new ArrayList<>();
+                while (rs.next()) {
+                    String uniqueIdString = rs.getString("uuid");
+                    UUID uniqueId = UUID.fromString(uniqueIdString);
+
+                    BigDecimal balance = rs.getBigDecimal("balance");
+
+                    dev.xhyrom.lighteco.common.model.user.User user = this.plugin.getUserManager().getOrMake(uniqueId);
+                    user.setBalance(currency, balance);
+
+                    users.add(user.getProxy());
+                }
+
+                return users;
+            }
+        }
+    }
+
+    private void saveBalances(PreparedStatement psGlobal, PreparedStatement psLocal, User user, String uniqueIdString) throws SQLException {
+        for (Currency currency : this.plugin.getCurrencyManager().getRegisteredCurrencies()) {
+            BigDecimal balance = user.getBalance(currency.getProxy());
+
+            if (balance.compareTo(BigDecimal.ZERO) == 0) continue;
+
+            switch (currency.getType()) {
+                case GLOBAL -> {
+                    psGlobal.setString(1, uniqueIdString);
+                    psGlobal.setString(2, currency.getIdentifier());
+                    psGlobal.setBigDecimal(3, balance);
+                    if (SqlStatements.mustDuplicateParameters(this.connectionFactory.getImplementationName()))
+                        psGlobal.setBigDecimal(4, balance);
+
+                    psGlobal.addBatch();
+                }
+                case LOCAL -> {
+                    psLocal.setString(1, uniqueIdString);
+                    psLocal.setString(2, currency.getIdentifier());
+                    psLocal.setBigDecimal(3, balance);
+                    if (SqlStatements.mustDuplicateParameters(this.connectionFactory.getImplementationName()))
+                        psLocal.setBigDecimal(4, balance);
+
+                    psLocal.addBatch();
+                }
             }
         }
     }
diff --git a/common/src/main/java/dev/xhyrom/lighteco/common/storage/provider/sql/connection/hikari/HikariConnectionFactory.java b/common/src/main/java/dev/xhyrom/lighteco/common/storage/provider/sql/connection/hikari/HikariConnectionFactory.java
index adc5b84..303b9cc 100644
--- a/common/src/main/java/dev/xhyrom/lighteco/common/storage/provider/sql/connection/hikari/HikariConnectionFactory.java
+++ b/common/src/main/java/dev/xhyrom/lighteco/common/storage/provider/sql/connection/hikari/HikariConnectionFactory.java
@@ -64,12 +64,12 @@ public abstract class HikariConnectionFactory implements ConnectionFactory {
         this.setProperties(config, properties);
 
         // configure the connection pool
-//        config.setMaximumPoolSize(1);
-//        config.setMinimumIdle(10);
-//        config.setMaxLifetime(1800000);
-//        config.setKeepaliveTime(0);
-//        config.setConnectionTimeout(5000);
-//        config.setInitializationFailTimeout(-1);
+        config.setMaximumPoolSize(this.configuration.maximumPoolSize);
+        config.setMinimumIdle(this.configuration.minimumIdle);
+        config.setMaxLifetime(this.configuration.maxLifetime);
+        config.setKeepaliveTime(this.configuration.keepAliveTime);
+        config.setConnectionTimeout(this.configuration.connectionTimeout);
+        config.setInitializationFailTimeout(-1);
 
         this.hikari = new HikariDataSource(config);