This talk about never sell at a loss I want to believe is just a personal trading style. It's not a rule. It may not work for you. You choose what works for you. A case in point is trig. I bought trig when it was 60k Satoshi. Then all of a sudden it went to 63k then started a downward trend. Went below 60k. And then sticking to one principle of never sell at loss you keep your coins. Hoping that someday it'll go above 60k again. Yes, maybe it will. But the fact is trig is about 11k today....damn. If only I had sold when it was 50k or 40k I would've cut my losses. And the truth is I may have done trade with same funds that were stuck in trig and generated more profit than the little I would've lost. So the point is "never sell at loss" is one principle not rule. But so is "setting stop loss" This has to do with you selling your coin when it goes a little below your bought price so as to cut losses early if trade didn't go as expected. Then u can now use the available funds to trade other coins and make profit. Just a humble opinion.
Bring down your views.. This a real life story..