This actually happens all the time. I have seen people betting like 0.00000100 sats on martingale and they end up losing like 2-3 BTC because they hit huge losing streaks. Its very dangerous.
With that amount of his bet and how much he lose, then I guess the problem is he took high multiplier, maybe over 2.0, so thats why he hit big losing streaks. Like I said before, martingale isnt suitable for bet on high multiplier and those who dont have enough balance to cover it.
No matter how much is the multiplier, martingale is still martingale that may give you such losing streaks. With that amount above, someone may lose 3btc in 26 losing streaks with 2x multiplier and 100% increase on lose.
The same if you choose lower multiplier, because when someone choose low multiplier and do martingale he will increase more than 100% on lose.
Overall, martingale is not suitable for any multipliers if you ask me.
Sorry I want to correct my post, 2x multiplier is still safe for martingale, I haven't seen many losing streaks over than 10 in a row, so with .000001
BTC, if you lose 10times in a row, you still lost at least 1m
BTC. Then I realized that guy who lost 2-3
BTC made multiplier higher than 10.