Some people refuse to take profits when their coins and tokens are surging so high.
Because greed let people keep on waiting for higher and higher value for there coins and end up selling at dip.
Since price can’t go up all the time.
It all depends on your needs and profit targets before investing. I'm not saying those who don't sell when prices soar are greedy because they expect prices to be even higher, maybe those who don't sell apply long-term strategies without paying attention to profits, of course, investors who invest like this don't think too much about short-term profits. However, if the profit target has been achieved and does not sell it then this is classified as greed.