We cant deny that as of now we use bitcoin to get profits. So for me if i think that the price of it will go down, or the current value of it is satisfying or even i really need money, I also would sell it. But if this criteria is not meet, i would hold it as much as i can hoping that it will increase its value in the future. But for now I think that a lot of people panicked because of sudden huge drop of bitcoin that they afraid of losing to much that they sell it.