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.
Greed is never a good thing in all cases, it's just because of greed that many people choose to invest in shitcoins, they want to make money fast, make a lot of money, and very few people achieve their goals when they are too greedy.
If you want to have a lot of money instead of being greedy, you should have an investment plan and choose less profitable assets like bitcoin, but in return, there will be safety for us. I can confirm that all of our investment mistakes are rooted in greed, so it cannot be said that greed is good.