Not too greedy, my strongest point when gambling is I know where to stop, that is the key way to never lose too much money and end up in a very ugly situation where you may face bankruptcy, so always know when to stop and you will be ok.
You indeed need to know when to stop because when you do not know when to stop it can deliver you a lot of problems in the financial section in your life.
Greediness is also playing a role in this if you are this you can get addicted..