Mathematically, the best thing to do is lower the house edge. That means don't wager the same money more than once. Martingale leads to a large house edge, meaning on average you win more.
The best way to get the lowest possible house edge is to place only one YOLO bet (all-in) at any multiplier you desire. After that, win or lose, don't ever come back!
But that's math, not fun, and most gamblers don't play for the best chances based on math.
The funny thing about Martingale is that new gamblers all think they've invented it I've been there too: "wait a minute, if I just double this, I can win back everything and turn a profit!"
I totally agree, and I’ve said that some times on this board, although using other terms. And I’ve sometimes done it: I’m not too keen on casino games as I play poker where I have edge vs other players and I know I don’t have edge vs the casino but at certain times I’ve made one or two low-odds high-reward bets just to try my luck. Other “strategies” apart from that one will lose money long term.
If you play for fun or entertainment and you get some money from time to time (although losing long-term) it is different matter entirely.