Martingale strategy, where you double-down to cover your losses... It might work in the short term, but remember, you are gambling, and there is no such strategy that would guarantee you profit. The idea that you can keep doubling your bet until you win, and eventually recover your losses sounds good, right? But remember, casinos have a house edge which always helps the casino to win in the long run. And also your wallet doesn't come with infinite funds. So when you keep on losing, you will keep on doubling your bet and eventually will get cleaned real quick.