Usually, people who win in gambling but not able to cash out or save their winnings and I think this has something to do with a Healthy mindset.
If you do not have the intention to save the wealth, you will lose all your winnings by risking them again in another gambling bet.
I will like to inform you that if you also have the mindset and refused to take action there will be nothing left for you to have at the end of the whole show, many people have won a large amount of money that is good enough for them to remain ever rich and successful in life but later you will discover that they have squandered the whole money back to gambling and wareward life and remain poor instead of them to have taken necessary actions to invest with the money.
That's is life for you, there must always be the foolish ones who certainly doesn't deserve to make it. Money won in gambling I would say it's like a trap set upon the gambling and only few always manage to surpass this setup and most times some people feel too comfortable when they secure a massive win and spends all the money and don't ever boder to think of what the future will be.
If we are also to go out of the gambling context, you will still discover many people in real life being unable to know how they could handle money the appropriate manner than wasting it, we know how some gambler's kind of lifestyle goes, they don't mind loosing it all today to remain stranded the following day, dont get me wrong because this is not applicable to everyone, but we are dealing with the common occurrence in this manners with the general gamblers mindset.