For me in my opinion it's better to sell BTC in short term trading. Because you will never know when it will pump and dump 
as you can see there is a time which bitcoin getting dump and other coins will rise. Better sell it in short term trading then buy again if the price will dump.
Everyone has his own opinion but I think otherwise. I think of holding of bitcoin as the most appropriate option. It is you who has to decide as per your own skillset and experience. For me, holding is the best thing to do but things may be little different in your case. Short term investment is also a very good thing to do but for that you needs to be very, much active and sharp minded person. as you can see there is a time which bitcoin getting dump and other coins will rise. Better sell it in short term trading then buy again if the price will dump.