No, it's not a good strategy if you have limited funds I've tried that many times in the past and I always ended up in a losing side, you sometimes win but most of the time you lose, a lot of people have experimented on this strategy and depends on your control and luck you can only extend your playing time but winning I don't think so.
Chance of losing is high and winning is just a tiny piece of chance whenever you do this. And if someone keeps on trying this and keeps on doubling the amount which is known as martingale.
The time that he win then that's already the call and sign that he should stop and keep the profit that he took from that win and don't repeat the cycle.
No matter what the strategy is, if you don't have luck, you will not have a chance to win the games. Even if someone is trying to double the amount, that will not work because we don't know if we will have luck or not, and we don't know what will come out at the end of the game. And yes, if he can win, then that will be the time to quit gambling as soon as possible before it is too late to realize.
You are overrating luck. Luck is there as is but don't overrate it and tell that whichever you use, you won't win. That's simply wrong, let's assume that everyone has their own time to become lucky but don't ignore the strategies that gamblers do.
Experience is building these strategies but if you don't feel crediting it and it's not effective on your part, that's ok.
Okay, I got that. At least, they should know that in gambling, they must have luck which they can not always have it. If they can know that, I guess that they will be careful to gamble. But unfortunately, many gamblers chasing their luck until they spend more money, and some of them forget about luck. Let say he has luck in one strategy or method, so that will make him get winning. But in the next chance, although he uses the other strategies if the luck leaves him, the result will lose some money. And that can make him try with the other strategy.