I have never made these bets, but from what I have seen and understood, these strategies of increasing the bet after losing seem very risky. It seems like a cycle that is hard to escape and in the end, mathematics and chance always end up against the player. I think overall this shows that there is no magic formula to win these games easily. But I have one question: do you think there is any strategy that actually works in the long run?
Martingale strategy will lead you to heavy loss, because there is no guarantee that you will win your next bet if you double the lost amount. There is no gambling strategy on earth evented by man that can give you constant win in the long run because gambling is based on luck. The most skillful gamblers on table games will definitely run at loss in the long run because they will never be satisfied with their wins and would continue gambling.