Do you really trust online bitcoin casinos you play at?
I think all lost in casino, except the owner.
i don't know about all lost in casino, i play casino for fun, I read article gamblers will not go home when it win because they want to win bigger, the gamblers go home when lose or run out of stock. So the reality is 90% of gamblers must lose
But if you gamble against player like in PvP games someone will win the money and if one will go home with losing all of his money then the other person will go home with a lot of money and will be rich. That is also the case of online bitcoin casino if the house edge is not much high.