When you lose a big win, it is always very painful and difficult to forget, it's not because of the money but the game since you have being working very hard to have that win and it is close to you but due to one mistake or the other, it was a narrow escape to lose, it is not always easy to come out of that shock.
I dont say that is a mistake, but it is your luck in gambling. Nothing is a mistake or an accident if you see it like that. However you are always given the choice to play or not to play but if you choose to play you have to accept the consequences that come with it.
If you worked hard to get that money, why play with it? It could be used to fund something that you have been wishing to build for years. Or you can put it in the bank and reap the interest from it. It is because we are greedy with the habit of increasing the amount of money we already have for things we do not need.
If you dont fall into that trap, you will never end up gambling more than your budget.