Draining a rather interesting plugin called RoyaleEconomy. With this plugin, you can create an absolutely balanced economy on your Minecraft server. It has everything: here you have a currency, and a banking system with the ability to deposit money, and a shop (market) in which you can set it up as you please, and even have talismans, money for killing mobs. But this is not a complete list of plugin features.
You can read all the spigot documentation yourself.
How to install the RoyaleEconomy plugin?
Vault and ProtocolLib
Download the plugin.
Take the downloaded file and transfer it to the plugins folder of your server.
Restart the server.