I see some users are suggesting that you should create some in-game currency that can be converted to Crypto, but for me it kind of defeats the purpose. I want to see a server where you can use Bitcoin (BTC) as the economy and not some kind of fantasy token. (We see lots of games where in-game currencies are created and in some of these games, people pre-mine them to enrich themselves)
Minecraft still has a huge cult following and we can tap into a group of people that are very passionate and would appreciate some real world reward for their time and effort. (That are not linked to Fiat currencies)
