If you believe that sometimes, gamblers can also win the casino, kindly drop all the explanation of why you have such a believe.
In my opinion, depositing $50 and withdrawing $500 can be considered winning at the casino.
Winning at the casino isn't just about winning a life-changing amount, but also about withdrawing more than your deposit during that playing session, even if you're still in the red or only have a small profit overall. Winning at the casino for a huge amount is something very few people have ever experienced.