There is no perfect strategy for this. It only lies in our luck. If we see other gamblers win, that is absolutely because they are lucky. Because even if you are using the same strategy, you won't expect the same results unless you are betting together. This is not trading where we can correct our mistakes and be good. But this is gambling, a game of chance where we rely on luck, not on strategies. Of course, knowledge and experience contributed some to a better analysis, but without luck, winning is impossible.