Every investor always hopes that his investment can generate a profit in the future. Even though they are as insecure as any, because of the price situation that continues to decline, they are patient in dealing with it. So, selling BTC where the market situation is plummeting is foolish, and of course you will experience a loss, then for what you buy BTC if finally it ends in this way.
OP was able to sell half of his holdings last December and I would assume he is already in profit even though there is still remaining half that he is hodling that may seem like pure profit. OP is lucky because he was able to sell at the right time and should be patient enough because market has cycles and even if we are in a bear market, time would come when the market would turn around again and that's the time to claim profits.
Right, keep holding than selling all with down trend will gives more loses. When in rise sell some of your coin then hold the rest. So depends on how a person attack or handle his investment in the market.
If one is selling while in downtrend, it is just alright for me when there is a little percentage of loss but if one is selling when he already lost half or more than half of its value then that is just giving up because of hopelessness. This bear market has teach a lot of people to always secure profits or cut loss because too many coins have lost more than half of its value and some even 99% of it.