But the casino is a business. The only rule is that the casino will always get the mathematical expectation (advantage). Casino always wins! The more people play, the greater the probability of loss. The human factor is also considered. Our memory is highly selective. You cannot remember the number of small losses, but a great gain will be remembered for a long time. Then you play again and again, hoping to win again. Ask any player how much he lost. He will tell you a great amount, but he will try to pull the plug more often. However, it still continues to play. Because he has no choice. He's already an addict.