if you can resist the temptation to keep on playing/betting once you double your money. Because that is the scenario when a gambler becomes greedy. When one knows there's still a lot of money to spare to keep on betting, that's when he gets into trouble and gives in to the urge to bet more.
But, if you can keep the discipline to keep on withdrawing every time you double your money, then I bet you are going to be a good gambler. Still, do not expect you can win on the next round because everything is recorded in the gambling sites and there's a chance you might not repeat the same feat.
Many people lose can not resist the temptation on gambling and makes them gets deeper in gambling. They hard to leave gambling because gambling gives them a chance to win the games although that will not easy.
But they willing to keeps trying to win even with more money as they slowly don't care with anything that can happens to them. They will keep trying to double their money and then quit gambling but their plan will not works as they want.
That is what will happen to those wo lose the discipline and other things needed to playing gambling. They will also lose a chance to keep their money and only spend until their money is gone.
Even how hard they tried but when greed and emotion starts to control them the outcome will be the same, just a repeated mistake that will happen from time to time, it's better to make that hard stop when you win then enjoy your time away from the casino making sure that you'll be able to take advantage and not to send it back when greed push you to keep aiming for more.
People / gambler tends to think that when they are in the winning streak that kind of luck should not be wasted, they want to seek for more and at the end of the day, they'll lose it back.