Previously, cryptocurrency exchanges were anonymous, but the more regulated the cryptocurrency becomes and the more people use it, the less anonymous the exchanges become. The same goes for the casino. The more regulated casinos are, the less anonymous they are.
I don't think this is entirely true. For example, Bitmex was more popular as a derivatives exchange before they introduced mandatory KYC. You would say when they introduced mandatory KYC for all their customers, they became compliant and fully regulated. Many traders abandoned for less strict exchanges.