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Congratulations to you OP, that's a big amount of winning and also that's a good decisions to quit in gambling because you already have a profit but before that like what other user said above make sure to withdraw it first in order to prevent such loss. But in my own I don't think so if you are permanently quit in the world of gambling because once you are experiencing a good amount of winning then theres a chance that you will be gamble once again.
I have seen many stories similar to this, where a player makes a lot of profits, but because he gets very excited and wants to make more money, he ends up losing everything, and that is what should be avoided because a person who has money is better than not. nothing, I'm one of the players that when they get some profit, they withdraw at once, because I know that if I keep playing I lose it, or another strategy is that I'm going to play something else, but little, what interests me is to try luck and if I see that I have no chance I'll go with my earnings, it's better to have the money and enjoy it than not having anything because I lost it in a very foolish way, and there are people who don't mind losing that amount of money.