If you can wait for a long time, it might worth to wait. But for other people it can be more interesting to sell cheaper than they bought, so they recover part of the investment and try to recover the loss with another kind of investment. And once they fully recover the money, they can get in Crypto market again, helping Bitcoin to rise again. It's a different strategy, but on long term it can help BTC too.
in my opinion there is nothing wrong with selling bitcoin even at a loss. but what IS wrong is when their reasons are wrong. for example when someone sells out of panic, or sells because of some FUD then that is wrong. but if you sell because you speculated a drop and wanted to have the money ready to BUY BACK at a lower price a larger amount of what you had before, then that is perfectly fine.
That's good, I am not afraid, so I will not care about any FUD about crypto, and I will not advise anyone to sell them. In my opinion, I only need to stick to my own ideas, and the rest worry is superfluous.
+1