I think we all should not try that. It's hard to win in long term.
However, it is good if we consider gambling as our way to relax, nothing more than amusement game.
I've never tried to win like that in one play
Big win, big loss, I meant.
Good luck, big capital, big win.
Bad luck, big capital, big loss.

Maybe they have big capital for that and they are lucky on that day but maybe once you are unlucky you will lose it also.