I would say neither, its bad to sell when the bull cycle is far from over. With Paypal making Bitcoin available for buy and sell and big corporations flooding their money into Crypto Market. I would say HODL for a little bit be patient cause the rewards can be much greater if you manage to hold out this year.
Yes, selling when the bullish market circle is yet to be over is not good advice but if the investors were among those that bought when the price of the market was around $6000 there's no problem in selling now because tomorrow are not promise cause don't the next trend the market will pose.