I also think gambling in long run always ended with nothing we must learn when to stop, i also have bad experience on gambling site when i was in profit i get more greedy and than busted.
Most of us long in the long run because we do not take gambling seriously, we like to play in gambling basing on our luck and even if we only have a little amount of bankroll we always push our luck until such time we lose in the end. The house has unlimited bankroll so even if we are lucky but we do not know when to stop we will still be losing in the long run.