I would like to add to this that some people are pathologically addicted to gambling. Yes its a disease for them and they cant keep their hands off the casino when they have time at hand. They would procure every penny simply to gamble it away and then cry about it. But even if they repent they dont care if they go into debt. They need professional help and thus are a social nuisance.
The only positive thing that gambling can teach you is - Greed kills and one should never be greedy in life. Be content with what you have, try to earn and live a happy life but never be greedy.