Greed is double edged sword, it could be good or bad depending on the part of sword you are using! Without greed you may not really think wide and far enough for you to achieve greater price for you holding!
Agree with your opinion. Greed is a double-edged sword. As luck would have made some huge profits. But if we are not lucky and sell at the right time when the price is high, then we will regret not selling