I don't think this will ever happen as I don't think that countries and authorities will let this happen. Even now, many crypto gambling and betting sites must verify their users to prevent underage betting and money laundering. Players prefer sites they can trust and those sites are sportsbooks with licenses. To get a license, the operator will have to impose a KYC procedure. I generally believe that anonymous gambling online will disappear from most reputable brands.

I also believe that many fiat casinos will start accepting cryptos and crypto bookies will start accepting fiat because the ultimate goal of casino operators is to make money. The more customers they have the more money they will make. So, they will obviously try to meet the needs of as many players as possible.

This is all just my point of view of course based on the happenings over the years. We can't really ever know what comes next. But I don't think that governments would just give up on all the profits they can make with licensing fees.