I have never experienced winning in gambling in large numbers. Usually I always play a small amount, because I'm always afraid when playing with a large amount. Not that I do not want to win big, because we know for yourself that the risk of playing gambling must be huge too
Of course everyone wants to win big but very few people actually win big. That is the also the effect of why the casinos are a flourishing business and gambling is most of the times a loss for the player. A player will go to the casino with the thought of winning big, nobody want to go and lose, but the expectation does not turn into reality.
Risk may be huge but there are big winners who cashed out their big win and never gambled again - its rare, because an addicted gambler will deposit again and lose that money.