FTB Money Mod 1.16.5/1.12.2 is an extremely WIP mod to use. It will add to the game you play money along with shops and a trading function.

What is FTB Money Mod?
It’s still in development. Therefore, it will drop more features into the Minecraft world. Not only that, the owner recommended you avoid using it in mod packs until it has other additions. However, it will not break anything if you decide to add the release to launch with FTB Quests.
How to utilize
Choose /money to view your balance, /pay to pay somebody money from your balance
/shop and /trade are WIP and you can disable them easily.
OPs can experience /setmoney to reset someone’s balance.
At present, it’s feasible to combine the creation with FTB Quests to explore tasks and obtain rewards.
Currently, there is a bug. But, it will not exist anymore if you die. You can fix that issue by logging in to the world/server again.
FTB Money is also a server utility mod. It requires Minecraft Forge and FTBLib.
Screenshots