If you want players on your server can buy or sell things, earn money playing in casinos, then the plugin EconomyAPI you need not apply. This mod is the basis for the economy and it has only money and manage, without it you will not be able to create a shop, a casino, to buy or sell things. Below you will find a list of plugins that support EconomyAPI and without it they won't!
I am a professional from Minecraft PE Team that creates and publishes the best content for Minecraft players. We have been studying custom gameplay, modding features, as well as popular game themes for a long time. You can be sure that our materials are designed for the player to spend more time in the game world than usual. Additionally, our modifications will allow you to turn your game into absolutely any other theme. I'm also a pretty good player, so I'll try to answer any of the questions in the comments.