Yeah, fear and greed are the two outcomes of every trading and investment experiences on the crypto space. Every trader/investors can fall on either of the two or both at certain time of trading and investments periods.
Fear is an emotional feeling, a trader/investors think that prices of a coin/token will crash, and suddenly closes his/her entry positions, some times with a heavy loss.
Greed is also another emotional feeling, a trader/investor think that he/she is going to take TP/loss at a very high percentage levels, unfortunately the market prices goes down below his/her trading/investment entry positions.