For sure an investor will have to keep holding if he really wants to get benefit from crypto coin investment and it Always takes long to recover the price till then only holding is a profitable way of cryptocurrencies investment. Holding actually gives safety and satisfaction about gaining profit. Panic selling is the worst thing you do in crypto currency.
Right, I never prefer exiting market at loss, no matter what! Holding coins even if their value is lower than for what you bought signifies that there is still the possibility of making profits. Once you sold your investment, you lost the chance of making any future profit. So my suggestion is to always hold coin if it is in loss because eventually every loss could be corrected to profit.