If I get the chance to win a lot of money, I will stop and withdraw the money because I may not have another chance to win anymore. Instead I can lose money in the next round, I better stop gambling and get out of the casino. It can help us to maintain the self-control that we are practicing so that we can continue to be aware that we cannot always win, let alone win a lot. We also have to know that in gambling, we can't always win after getting a win.
This is easy with someone who is not a gambler but have just tried few times and accidentally got a winning. Such person can decide to back out but for someone who does gambling often times, he won't stop gambling because he has won some money from the casino because he understand that it is his turn to win and the luck has come to him. He can only be careful not to lose more than he has been losing already. It is greed that make a bettor to lose higher than he has been losing because he wants to take higher risk.
Many of us have gone through that situation, but how many have controlled themselves when they see that they have won and that they feel that they are lucky to keep winning? I think that very few can control that, and I speak for myself because I have been in that situation and when I have won like this, and if I keep doing that playing then I lose everything, and sometimes I have lost everything and more because I have made the mistake of put more money to see if I can recover something, not everything but something, but I don't continue playing because I have already lost a lot of money, I stop because I have to, the responsibilities that I must fulfill do not let me continue, if I stop pay my rent they take me out on the street and that doesn't let anyone make more bets.