Fear... the person who is afraid when there is a slight dump or price correction that could make him someone who has weak hands... I hate him. Meanwhile, someone who is greedy is actually also bad for me, but at least he is more patient and willing to wait for the price of his coins to rise to a certain point which may not be unreasonable.
The striking difference between the two is patience, a person who is afraid will panic when prices fall, while a greedy person will be patient and wait when the market is bullish... even though no one knows when the exact time will come for a bear market.