When we are at Extreme Greed you need to be taking some profit off the table. Most people in crypto fail to keep the money they've made. They either sell too late or they selfishly watch all profits fall back to zero.
Like I have always said that greed is just a root of all your problems especially in investing and if it involves with money. I've experienced both selling too late and just want to reach highest profit possible but in the end if people knows when to stop, that's the real winner right there because they can search for another opportunity to gain more profit instead of just looking at 1 source for long time but in the end they sell too late.