It depends on the situation because sometimes we need to sell our bitcoin or any token that we have even the price is red because sometimes we have our needs that we can't provide our money if we did not sell our token. But as long as we can hold we shall need to hold to more profit.
I think it will depend on our need, like having to pay for daily necessities or something like that, but I will do my best to holding my
bitcoin when red market happen, because only the losses you will get when you sell when the price is red, better be patient and hold