I found a server, on minecraft, that is like a casino, and pays in bitcoins.
at first, you can play free with play money, but if you want to win actual bitcoins, you must donate at least 0.01BTC to their Bitcoin address, then you can type /mode which then you play for bitcoins.
You cant PVP or die on the server.
You can play several games:
Minesweeper (with TNT, shovel and a piece of ground)