Some always want/need MORE. No matter how much they already have. Do they ever get enough or too much? How would they know?

You undoubtedly KNOW when you have enough. You probably have experienced having TOO MUCH ( to drink or eat or whatever) and don't like it so much. Some don't have a clue what the concept of ENOUGH is or that there is such a thing as TOO MUCH. Are they doomed to success because of that?