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.
You made mistake because of your greed to hold more and I see no difference. If you want more then that means you're greedy and it's not just a mistake because you're the one who decide to take that risk, hoping to gain. Well, it's a human nature to be greedy, because who don't want to earn more than you should right? But we need to control ourselves and think of the present. If you already earn then take profit already, buy back and hold. It just depends on our strategy on how to take advantage the opportunity for our own benefit.
Such is indeed human nature, those who are greedy will always feel lacking with what they have obtained,
in this case it is very important to control yourself and for some people they usually don't realize it,
greed is pointless and will only make us lose more.
and for sure this is one best way to lose everything as you will keep seeking for growth even without complete knowledge and skills.
greed are the reason why many of people here losses their funds specially in Altcoins that we knew many are created to be scamming and not truly to bring profit.