huge bankroll still has a limit , so it would still never work to earn profit . at some point you got a losing streaks and that time the whole bankroll you have just gone in a couple seconds, martingale betting system was never ever be a good strategy it's even the worst strategy to sucks your money faster in regret. even you know when to stop , when you do martingale continuously in the next days , it's useless.
There is no otherway but to do a forced stop whenever you win after a long losing streak. That is the best strategy for martingale in order to book a winnings. If we keep on going with this method without stopping, then we can just find our bankroll emptied since martingale is disastrous in the long run.
well if you can manage to quit after maybe hitting 3 times might possible to earn little coming from this system because staying for a long period will really messed up with your bankroll, better to be contented with small winnings than to lose everything you've got.