Greed is the enemy of man. Anything that involves money,you always see greed and whether we believe or not greed drives any financial market or state.
Gamblers need to fight the spirit of greed, but this can't be curtail if one isn't satisfied with his winnings, that the foundation of the problem. We must accept any outcome at all and not allow greed drive you to place more bets, because nothing is certain in gambling. As past winnings doesn't guarantee that same can happen again (future). So satisfaction (contented) with our winnings as this plays a major role as we gamble. And remove the habit of expecting much, or believing too much in your bets.
The earlier we build ourselves not to be controlled by greed the one step we add in our life outside of gambling.
Uhmm, Greed isn't actually the enemy of mankind, it is ourselves is our own greatest enemy. Greed is a human nature, I mean we all have different kind of greed. There is a greed in gambling and greed with other stuff too but all of these are almost exclusively associated with money. A person maybe contented at some point, but after some time all of us will have to move forward and yearn for more, we may not be able to label at as greed since we got contented at some point, but it is actually greed.
Now, greed in gambling is the most dangerous one because this purely involves money and more money. Winning or losing greed always follows. Again, it's an enemy, it is a human nature. If you know how to handle it, you will have a control over it.