That's funny. I always play "safe", i mean i had like 1250 sat, and i bet 1 sat with 100% on loss (classic). Very approximately, it means I have to lose 10 times in a row to lose it all, which means again approximately 0,5^10 chance to lose = 0,00048% chance. And guess what ? Yes, I lost it all.
It is kind of weird, i don't get how people can win that much money (High rollers, they're insane right ?) ..