It is a very usual thing to happen that if a gambler wins on their first bet, it is followed by an all-in decision. And this kind of idea is not just risky but a suicidal move. That is why many gamblers went home empty-handed from the casino because of uncontrolled gambling habits.
All-in is supposed to be the hardest decision for a gambler, I would say the last thing in mind, but players who after much trials, win, rush to go all-in. It's devastating, because losing knows no all-in, and more painful to cut short the thrills of gaming for an uncertain quicker and bigger win.