Those are called smart investors, and maybe even a newbie can understand that it's better to accumulate and HODL Bitcoin for as long as we can and not sell specially during dips just like what we are seeing right now. On the contrary, it's a good time to buy as again, there are meme's that says that they missed the boat but then when the price goes on a correction, still they don't want to buy as they are waiting for the price to go down further.
But in any case, it will be better if you can't really resists to sell or there is an emergency that you need money, then do it but not 100% of your stash. At least leave some for you and then start all over again, accumulate hold, simple but very effective formula and then look for the bigger picture again.
Although there are situations where the emergencies outweigh your emergency funds and floating cashes, and on the note that there is no other way to source funds within the timeframe apart from loans, then you can shave off some part of your holdings with the intention to continue your accumulation when things bounce back to normal. I am not a fan of loans and would not advise anyone to go in that direction when they have money locked in bitcoin since the interests might be mind-blowing and cause more problems for the investor on the long-run.
The reason to plan for emergency fund is that certainly in life we will definitely come across unexpected issues that we will definitely want to solve without selling out our bitcoin holding in a short while so it can easily be sort out with your emergency fund.