But with the developments in the gambling business today, most are getting their license so they can operate better, hence, most of them are requiring kyc from their clients. Very few casinos have no KYC requirement up until now. I would say, the trust is already in the casinos that require KYC because they are also under the gambling regulations of where they got their license.
Money likes silence, so no one wants to report big winnings because taxes have to be paid on them, and often very large ones. And no one wants to share their winnings with the state. That's why anonymity is so popular in casinos.