betcoinBetCoin Review. BetCoin is a Bitcoin sportsbook that opened in 2013 but has already made quite the splash. The sportsbook, which also offers a poker room and casino, isBetcoin.ag is a platform that offers over 3,000 casino games and various sports betting options using cryptocurrencies. You can play live games, plinko, and more with other players and see the latest bets and payouts.