The only safe way to avoid losing money through gambling is dont gamble at all. If you cant stay without gambling then understand that losing is part of the game and the casino owners are in a business that wants you to lose. they will do anything to get your cash. so just gamble for fun not to earn.. Never heard of anyone who bought himself a good car through gambling. even if they win big they eventually lose it again.
Which can be rich in gambling is just the owner of a gambling site. Because they will certainly benefit from gambling that he runs. If a player gambling is very difficult to profit from gambling even highly unlikely to win the gambling continuously. It should not play gambling, but if you want to gamble safely should not bet large amounts. So a defeat that would be obtained very little.