Even with whales, martingale is devastating. It will only take some series of loses before the whale player runs out of money. So martingale isn't only devasting for low bankroll player but also devastating to those who have a huge bankrolls.
I don't know why some members refuse to understand/believe that the martingale strategy won't work even for players who have huge bankrolls! I provided a link to an article, in a previous reply, which explains with examples how a small number can become enormous after you double it few times. Even if you have an unlimited balance, casinos have bet limits and will not let you bet high amounts. I'm convinced that regardless of how smart you are or how complicated your betting strategy is, you can't beat the house.
It's inconceivable if you only have mediocre funds and then use the martingale method or strategy, you need a relatively large amount of capital if you use this strategy, why not use other strategies that are more rational in spending money, even though it's just gambling, not always using this method will benefit us in playing gambling, in my opinion it's only luck that makes you win, even if it's only a few percent, but it's still the dealer who will win it...