Having greed is good, its the stupid mistakes that make you lose money. Greed is wanting more money, holding more than you should is not "greed", its a mistake, if you know what you are doing then you would sell at the top and buy at the bottom and make more money aka be greedy.
So all in all, do not make all the mistakes confused with each other, because emotions in trading world is very dangerous and mistaking which emotion is which could be even worse and that's an important thing.
I think that's controlled greed, the other greed was the one that could affect you emotionally to be making some silly mistakes, it's like when you are holding some coins in which already rising in price multiple folds and yet you don't want to liquidate just because you want to make more money, I think that kind of greed that's could affect your decision and is really bad for the investments in long term.