People are different in life. As some people will not stop gambling after winning huge amount, some people will stop and not gamble again if they do not want to gamble again. While some people will continue to gamble moderately without wasting too much money. So it is possible someone can stop gambling after winning huge amount of money.
Of course, each person has different nature. I don't say it is impossible to stop gambling when you win big prize, but it is small chance to stop it because you feel to grab more prizes. When you win big prize, you assume you have great ability in gambling and experienced enough. So, you keep gambling because you assume it is quite safe with your ability. Moreover, you must be triggered to win more prizes and will feel to regret it if you miss the opportunities. In this situation, stay to gamble is likely your option.