Walking away from the casino after a win is very Important but sadly some persons do not really get it that way, they all their emotions trick them into thinking that they can be able to still make some more money if only they are able to stay any further to try again and some ends up loosing it all, so I agree that until you leave the casino and start putting such funds into use, you actually don't get to really say that you have actually gotten the money, it's your completely after you have started spending it.
Gambling is tricky; it's as if it plays with our brains, which is what most people believe, on which they always link it to the reason why some gamblers react the way they do on several occasions.
If the gambler wins a big amount of money, if he's not the type that controls himself, his chance of losing all that money is very high, as the joy that comes with that winning could lead to an increase in his greed level and his confidence that he's on the lucky side will increase, which can only result in him continuing to try out his luck until there is nothing left to try luck with again.
In my opinion, this is typical behavior of a player after winning when he starts playing again. And of course, this is also connected with the fact that the attitude to the money won is very different from the attitude to the money earned. Many people think that the money won is some kind of easy money that can be safely spent on all sorts of nonsense. Well, and what's more, losing the money won in gambling is not as much of a pity as the money earned.
As a result, the game becomes chaotic and all this inevitably leads to losing all this money won.