You are using a database to sync addresses with players and other game related things. But the balances and asset ownership is stored in a blockchain so you ca

You are using a database to sync addresses with players and other game related things. But the balances and asset ownership is stored in a blockchain so you can exchange it with other crypto currencies. That means you could farm gold ingame, exchange with bitcoin, then go to a bitcoin atm and get cash or vice-versa.