I got the point of the story. You should be fearless in order to win big like those HR player but the fact is only those who have decent amount could act like that. As for the admin, you shouldn't be afraid. You should be happy instead to have such player. Meaning they are trusting your site to bet such amounts but if you will think that's kinda small winning though compared on other sites.
That's not considered fun playing when you invested huge amount of money, and for veterans player they always make sure that they're getting the most secured bet. These people stayed anonymous and exactly they're playing the type of gambling which they've mastered already. Being dangerous player, I don't think it's effective because
in casino whether it's a crypto or fiat gambling, the system was presetted by admins for those who they wanted to win on that machine.System was presseted by admins? So you are likely saying they are cheating because they can chose on who they wanted to win. LOL. I guess you don't know how gambling works.