Well, you are absolutely right about that, it is very easy to enter a casino based on cryptocurrency and especially bitcoin, because it is more reliable, it has superior security, we are not taking risks on the street, nobody sees us, those are things that They can be seen as a great advantage, but personally when it comes to the app I am somewhat distrustful, it is very easy for data to leak, hackers are on the prowl, also if you do not download the app that it is, you can download a fake app And that is worse, then it is delicate on that side, although there is someone who is doing very well.
Don't worry, if you worried of data or privacy leak, you shouldn't gamble on the casino where it ask you to submit your KYC. Or if you're really want to gamble on licensed casino due to various games you want to play, you should never submit KYC even though you're need to accept to lose all of your money.
Whether he likes to submit KYC or not if he won a life changing money, then I am sure he will surely submit documents for KYC in order to get the money. That kind of case is not impossible to happen because some of the casino style when a player won a huge amount of money is to ask the winner to submit KYC for verification purpose and if they pass the KYC they can withdraw and enjoy their winnings. At the end of the day even casino that does not originally aske for KYC requires it once huge amount is involved.