A nice article trying to explain why investors suffer from greed and fear. It also explains why these are more innocent and natural than emotions which are psychopathic.
https://www.collaborativefund.com/blog/origins-of-greed-and-fear/
Some Excerpts:
Greed happens when you overestimate how influential your past actions were on outcomes, enticing you to keep pushing right up to, and beyond, the point of eventual regret.
Greed is expecting back more than you deserve given what you put in. Which is exactly what happens when you overestimate your ability to do things that will directly lead to rewards.
When you’ve overestimated how much of your actions influence your results, you miss key feedback the world tries to give you, sticking to your guns instead of updating your approach.