In 2017 when bullrun took over crypto space and many altcoins joined later some people still keep holding thinking that their altcoins will keep surging and surging, little did they know that bull season always have short life span when comparing to bear season, bear season can stay for years but bull season is just in months, so why are you holding when you should be selling?
Remember that some bought bitcoin at 20k and they have no choice but to hold till today, imagine all this year's waiting just to get back to where you once are. Bitcoin is over 18k now, good for them cos they are near recovery since 2017.
Know when to get in and know when to get out, don't be a greedy bastard.
I don't think it's because they were greedy that they made that mistake, but because they don't have the knowledge and experience of trading, maybe they think about losing assets and panic too much when they see the price of the coin drop. It seems that almost all members of this forum have made such a mistake. I myself have also experienced such an incident.