So the cryptocurrency was created to be anonymous. Especially anonymity is necessary for the casino so that no one knows about your winnings.
Not really, the truth is most of cryptocurrency we've found are completely centralized and no have privacy feature.
It's different with Bitcoin which offer pseudonymous and privacy coins e.g. Monero offer completely 100% anonymous feature.
I don't think there's a casino doesn't know about your winnings, at least they have recorded your IP address, your address and where the funds send to. That's not anonymous anymore.
If a person wants to be anonymous, he will be. He will hide IP addresses, will use different wallets so that it is not possible to track where he withdraws money. But the question is, why does he need anonymity at all?