The forum above this category is full of all the casino and bookmaker sites you'll ever need. I personally like Sportsbet.io quite a lot, because they are one of the few Bitcoin gambling sites that offer the chance to win free bets in a couple different competitions that they run each week. They're also at a very high level, to the point of sponsoring a couple English Premier League football clubs, so you know that they are not going to disappear overnight and run away with any funds you might hold there. I've found the odds to be very competitive compared with fiat sites and they are always running different promotions. They cover all the basic sports offerings and pay out really fast.