To me, the biggest greed and evil is always the greed to make more money. Because even though mankind has made a lot of profit, it does not stop. He is constantly waiting to earn more money because this will increase even more. Afterwards, that crypto currency experiences declines and then, sometimes, it has to sell at a loss. I've had these, and I still do, sometimes. I think crypto investors should get rid of this greed.
All investors have that a bit, I think. When something goes up (a stock/crypto), you will keep thinking it will go up and up as you get creedy and always want more something. It is very hard to set up a goal where you want to sell something and stick to that.