If this year is red then this is completely unsurprising, after a sharp increase, a sharp pullback, this is a common phenomenon in the market of crypto-currency
Yes, it may be possible. In the last year end, we saw a steep increase, in fact for few coins it was sky rocket hike. And it is fact for each market that after a steep increase there is a fall in prices.
But, we cannot predict that all will fall or only a few, there is also a possibility that few will increase to mitigate the overall impact.