That's why you never use martingale strategy for long run, once you use it for long run, you will get that 32reds endless streak. So, before that happen, stop when you think its enough.
Thats why you should never use any strategy to gamble. If you are looking at the long term effect then the house will always wins. In short if you mathematically simulate the proabability of the losses then you will find out that the loss is always going to happen. If you get lucky using a strategy then better withdraw it and stop playing because the red streak is going to come soon.
For addicted gambler though when they see a green streak they just want to bet more and more and keep on multiplying their wins. Sadly it always ends up the wrong way