I have seen one interview of a former gambler and what he is saying caught my attention. He says that "when you're winning you can't sleep". I'm not sure if others have experience it or if this make sense. In any case though, one explanation is that we are really in a heightened alert, meaning it's like gambling is like a drugs that keeps up alive and awake and then the human emotions of greed takes in as we want to win for. But the problem is that after that, and in worse case if our luck turns bad, then this drug will like shoot to 100->0 in a instant. Or like when we are about to go to bed and suddenly that inch comes along and let's say that we go on sports bet, but the game will start in the next couple of hours, then we might have difficulty in sleeping and as if we take like 4 cups of coffee or a energy drink because we will for sure can't wait to see that game and hope that our stakes is going to win.
He is right. Normally when you have won a decent substantial amount of money you cannot sleep that easily. I have experienced it myself, I have won and could not sleep thinking all the good things I could do with that money and in the end I woke up the next morning and lose it all. This is what happens to most gamblers as they don't know to control their emotions, greed prevails because it is instilled deep in our DNA, like religious saying goes "human is never fulfilled, if he had a mountain of gold, he will ask for another one and if he has two he will ask for the third, only dust fulfills his mouth" meaning the human being is always asking for more no matter how much money they have. This I don't know how it can be fixed, I have started watching Dave Ramsey shows and his advice is somewhat good though not definitive.