1. No KYC
I know that this is not the most popular opinion especially among the crypto community but, in fact, verifying your identity (kyc) is not always a bad thing. Just think of what can you do if your account gets hacked? How can you prove its ownership to recover it?
Crypto casinos are unlikely to overtake fiat casinos, at least not in the near future. There are many things that have to change before we see such thing happening: price stability, faster confirmations, lower fees...
imo, crypto sportsbooks will not replace fiat ones also. there are pros and cons of using either of these bookies. and remember, the percentage of fiat players are still big compared to crypto gamblers. however, we cant deny the fact that there are really good advantages in using crypto bookies like no kyc feature. maybe 5 years from now, lets talk about the coverage of crypto sportsbooks, and let's see how big they become as compared to fiat sportsbooks...