Well sometimes holding is a very nice strategy on trading (if you are doing short trades of 1 day - 2 days max) because if the coin is good, it will go up no matter what
Right now i am really believes in holding because almost all the coin buy is very low on the market, so the best thoing i can do is to hold my coin and wait until the market will revover again, and i believe holding can really make us profitable.
I do not believe in this, you can see very clearly that bitcoin prices in the past few days have been falling sharply and fluctuating sharply, so at this point if you invest long-term risk will be very high. The market is bearish in the long run so bitcoin prices may fall sharply in the near future. So I believe you should only head short and trade the date at this point.