You have better odds doing a single bet than playing the martingale ie if you want to get 50% from your bankroll you have better odds of achieving it if you go maxbet/1.5payout than playing a martingale
You're saying that you have a higher chance to turn 10 into 15 if you bet it all on a single bet than if split the 10 into smaller pieces and bet them at a higher multiplier, smallest first, until you win one, and then quit?
Because that seems obviously incorrect to me. Betting all your coins you expect to lose more than betting just some of them.
An easier example:
Suppose you have 7 coins and want to have 8.
You could bet all 7 on a 1.125x bet.
Or you could bet 1 at 2x, then 2 at 2x, then 4 at 2x, stopping if you win at any point.
Is the single 7 or the 1,2,4 martingale better? What are the odds of success of each one? What's your expected return for each?
Work it out. The 1,2,4 martingale is *better* than the single 7.