Many gamblers know that they can't win money from gambling but they keep on gamble again and again but not with a small amount. Some people even borrow money from others to gamble. That means they never learn from their past gambling mistakes.
Are you doing this kind of gambling mistake?
Well, they don't win because they don't learn. Number one ---> don't bet against the house! <--- I can say that over and over and over again but nobody listens. Betting against the house is -EV (Negative Expected Value) <--- that means that you can expect to lose money! It doesn't mean you will lose money but you can expect it. Find opportunities with a +EV!