BitStarz is the best casino imo for using bitcoin. They don't operate in all regions - the US and UK being 2 big regions missing out. But they are a full fledged casino. And they offer the best welcome bonus I've ever seen in my years of gambling (seriously how the hell can they give a 5BTC match deposit? )

anyways - you can follow the link below to go there

https://www.minimumdepositcasinos.org/casino-reviews/bitstarz/