Gambling to double your money and quit immediately is easier said than done if you ask me and my reason of saying that is because when most gamblers win big, they tend to find it very difficult to quit. After big wins, gamblers are always tempted to try more which sometimes favors them and the other times, they do lose everything including their initial wins. So if I'm to advise a gambler, I think it's okay to gamble when you feel like to engage in it at your convenience and not because you want to double your money.
Many gamblers do not imagine the moment after which they would stop playing. Yes, most people think like this: "I will win a huge amount and then I will stop playing. I will start doing business and will never go to the casino again." But this is just a fantasy.
The trap of winning in a casino is that if someone wins, he will think like this: "I have won now and I can multiply this money as easily as I could do it now." And the gambler does not withdraw the money. Unfortunately, then comes the loss.