Statistically the Martingale strategy is no better odds than just going all in. You will just win more often until you finally get that long string of losses which bankrupts you
Nobody said you must play Martingale (also Fibonacci is more risky, but it can bring more profit)
You can play simple bets, no more money than your playing ballance.
EX: 50$/Parlay = 100$, 100$/Parlay = 200$ > Now, put 150$ in your pocket and start with 50$ again.
You decide when to bet and when to stay! If you lost 2,3,4 parlays, when you think the big one is coming, put some money on it.