There are not many high rollers that play like that. We've got a max win of 20 BTC per roll so they would have to go 1.2x with a 79.17% win chance. Need some balls to do that.
Do those HRs mainly Martingale? Palms be sweaty, knees weak, arms are heavy each time the bet is doubled.
Depends on his stack I think. You shouldnt stick to Martingale if your bankroll isnt huge or you may get wracked in no matter of time. Imagine he starts with 1 BTC and has a loss streak for eg 5 games. He would have lost
1 + 2 + 4 + 8 + 16 BTC at the blink of an eye.
You shouldn't stick to martingale
unless your bankroll is infinite.
I repeat, INFINITE.
No matter what the amount is, 1 or 100 or even 1000+, sooner or later there will be a round where you'll have to go all in to save your initial bet which is probably a few thousand sats. If it is lower, it is even worse.
The thing is that there is a cap on the max win, which is 20 BTC, so even an infinite bankroll wouldn't help you much.
If we take UserU's sequence as an example, after losing 16 BTC with your last bet, or
1 + 2 + 4 + 8 + 16 = 31 BTC in total
you have no chances of getting it back with your next bet, because you can't bet 32 BTC with 47.50% win chance. What you
can do is to bet 32 BTC with 57.58% win chance (1.65x payout), an win 20 BTC back in the best case scenario, but that's not what players usually expect from martingale.