I think there are few of them exists and most of them are already here mentioned before. First of all I really love primedice and stake, they are owned by the same company so you can consider them as one place, primedice has been around for over 6 years now and that is a lot of time in crypto gambling space, nearly nobody runs for 6 years without ever having any problems with the customers, usually something happens that makes the casino or even exchange or even if its a forum like this have some issues with the customers about a scam.
Primedice never had anything like that. Stake is basically primedice but with more games so it gets a pass too. Nitrogensports is definitely the best casino out there, they were really old too if I am not wrong so the same thing I said to primedice applies to nitrogen as well.