Gladly, I overcome already this weakness through securing immediately my profit by withdrawing it and convert to fiat via exchange P2P to avoid gambling again for more win.
Is this actually a strategy to overcome this? I doubt it. I have seen several times where gamblers rush to withdraw their winning in the first minutes and then /make a deposit in the next minute. When it comes to losing huge win to gambling, it is attributed to gambler inability to control his habit and allow emotion to control them. For gambler who can manage and control emotions are not easily tempted with the money in their balance. Although, leaving the money in your wallet would easily tempt one to gamble but having emotional control would discipline one regardless of whether they leave money in wallet or withdraw it.
Yes I believe that is a good strategy or step that leads to a prevention by preferring to make a withdrawal as early as possible before greed haunts your mind, I understand that it is not an idea that can really keep you from gambling again at that time, because of course as you said there is a possibility that they will eventually make a deposit, but anyway I would still think that the idea of cashing out early is always a good thing to do.
Although I understand that it does not mean that after that they will not make another deposit but it will always be a recommended action, but of course I also quite agree with your opinion that it all depends on whether they can control themselves or not, or whether they can resist the temptation or not, because if not then yes of course even though they have cashed out the winnings early on it is possible for them to make another deposit, meaning the first thing that must be correct is that they must have good self-control along with having a correct understanding of how the chances are in gambling, especially understanding that even if for example they continue the gambling session at that time by making another deposit, it does not mean that they will win again.