The most important thing you should have in gambling game is controlling yourself. Nothing else. By controlling yourself, you will be able to know when it's time to quit, how much money you can use in the bets and else. Controlling yourself will not easy to do because you need to have a strong mind to be able to stop in anytime.
It is greediness that makes many gamblers to actually lose money. There is always a time to quit and most times that is when the sweetness of making money do push many of us to start over gamble for profits. Whenever you are over gambling you should be rest assured that you are already on the part of losing heavily.
Yes, that is right. The greediness will come to the gamblers with or without they realize.
But for gamblers who can stop the games at any times, then I don't think that he should worry about being greediness because he always could control himself in gambling.
We need to know when to quit so we could control the greed in ourselves to not making us lose more money.