You're right, most big crypto exchanges and betting websites demand you prove your identity these days before you can use them.  Can't slide by anonymously like in the past.  However, there are still decentralized exchanges that let you trade crypto without needing to submit documents or selfies to show who you are and  these peer-to-peer platforms hook up users directly rather than going through a company in the middle.  So they don't have to follow the same know your customer rules that the centralized outfits require.