Even with high bankroll martingale can easily eat and deplete you fund especially when you encounter a series of reds in your roll. 20+ red streak can possibly make your bankroll negative and we all know that 20+ read streak is very possible. I even experience this in spinning a slot. 20+ dead spin. Imagine if I martingale my bet and I experience that 20+ streak.
If someone doesn't realize that getting to 10+ is a sign, he should stop immediately and doesn't stop gambling. Instead, he will only run out of money if he uses big bets, especially if he gets 20+ a series of reds.
Yeah 10+ red streak is the sign that the slot is in feeding mode but many slots player wanted to push their limits until they get more and more red streak with less winnings in lesser reward.
For slot games, usually after getting several losses, we can get a win which, even though it's a small win, can make us continue to gamble. So for gambling, I think it's really worth it if we stick with small bets even though we have a big bankroll because it sure hurts to see all our balances used up that day.
True, I always make bets in minimum and occasionally raise it 5x but I noticed that I hardly get a good win when I bet on a higher amount so I stay at the minimum to not only avoid huge losses in a short span of time but also to make my session have more chance of triggering the bonus round.