It is better to withdraw their winnings rather than use them to continue gambling because they cannot double their winnings. By withdrawing their winnings, they can enjoy them with friends or family. After getting their big win, they can return to gambling after taking a few days to de-escalate. And it is also a form of our responsibility towards ourselves to use the winning money to celebrate with the people closest to us. We must be able to be responsible gamblers to avoid selfishness and the desire to continue gambling because we want an even bigger win. It is wise to withdraw the winnings and rest for a while rather than lose all the money if we continue gambling.
I will often leave some pocket change for gambling after a big win, because otherwise i would just eventually have to deposit new money in. But i agree that one should definitely enjoy the winnings especially if it means you can afford to buy luxury. And if it's a life changing amount you are winning, (financial independence). Then it's doubly important to take most of it out.
I have seen that same thing so many time in crypto investing and gambling. And that is delusion that you can keep on going for ever. Keep on making profits and there's no end to that. It's really easy to say from outside that we should take profits out when in fact no one know where the top is and if there's going to be more profits. So many of us ride higher to get more pofits, but forget that it's not going o last. Eventually gravity (zero sum game) takes us down
I have been guilty of it too.