Playing Etheremon give you chance to mine in-game cryptocurrency called EMONT. EMONT, an ERC-20 token, is capped at 20 million tokens to be issued. The earlier you join Etheremon, the more EMONTs you can mine. Accumulating EMONTs brings you great value as you can trade them for Ether or use them in-game. In the future, when EMONT becomes the only currency in-game, its increasing demand will drive up the value of the tokens you hold.