In general, I don't trust crypto casinos in this regard. I imagine that the largest and most established ones will be safer, but they will always be worse in this regard than fiat sites such as Bet365, Pokerstars, and many others. If they have licenses from countries such as regulated Europe, the guarantee is much greater. There is always the risk of hacking, but it will be lower, and what is eliminated is the risk of your data being intentionally sold due to strict regulation and severe penalties.