Well, I didn't use fiat online casinos for a while, so I am not sure about how they work these days... before it was pretty complicated for me to play in fiat casinos from my county, deposits and withdrawals were so slow, and I had many restrictions. Now there are many online fiat casinos in my country, but I didn't try them.

But your question is in place, I guess many casinos will become KYC mandatory and that will not differ from fiat casinos, but at the same time, I think that we will have casinos that will be free for all without KYC. Crypto casinos that offer some anonymity, fast deposits & withdrawals will always be in demand from many users. So I guess if we can make any conclusion it would be that we will have everything in crypto, regulated space, and services but for sure we will have some "dark" side that will be free from any government regulations.