I know that as gamblers, everyone can relate to this question, as we have surely experienced it in real situations.
Suppose our bankroll is $100 and it has already grown to $500, would you quit or continue? Conversely, if with our bankroll, we are down to $10, would you still continue or save the remaining $10? I used specific amounts to make it easier to discuss this situation. I understand that we all gamble with different amounts based on our income, but consider this as an example. You can mention any amount you want based on your personal experience; it doesn't matter.
It depends on the gamblers how greedy he is, how much he wants to win, if in my case I would quit gambling immediately if it was $100 to $500. Because if I expect more, I will lose more. Those who don't quit gambling even after 5x profit to make extra profit, find that at the end of the day they can't profit anything. From my real experience, I went from $50 to $90 in gambling, I was hoping to complete $100 but I kept losing and at one point it dropped to $40. Since then I am not so greedy, I stop gambling if I can make some profit.
I won't stop playing until I lose below my target. When I start gambling with $50 my target is to lose $5, when I lose $5 I stop gambling. I don't try to recover losses, I gamble again later when my mind is fresh. However, those who try to recover from gambling losses by betting repeatedly lose all their money at the end of the day.