Any services not just casinos in the crypto world are very sneaky, there were even reported that services that is ban in this community that rug pulled a customer with a huge amount of Bitcoin. So in any case, there are still some sneaky casinos, maybe they are fly by night or hasn't established their reputation here so you must avoid them at all cost or casinos that have been flagged by the community already. But in any case, if you fall for their trick, I guess it's very hard to get back your crypto + winnings. Maybe you can reach out to 3rd party mediators as the last resort just to be able to get your winnings. But then again, this as scammers so I doubt that they are willing to cooperate to anyone and then they will just continue and more likely someone will still get scammed by them.