Yes, it's not possible anymore, but I'm sure that many of them do this kind of thing, there are several reasons, one of which is because they panic, and what we see a lot of is from those who are already from the beginning to take advantage in a short time, and they keep doing it. They still get benefits, but in this case there are things they might miss, namely when suddenly bitcoin moves up they will be a little behind.
I prefer those who sell bitcoin because their original intention was only to take advantage of a short rise, rather than those who panic because some people say that bitcoin might touch a price lower than the lowest price bitcoin reached some time ago. I have seen some of them saying that bitcoin will hit 12k or lower, like you said, so they decided to sell their bitcoin because they want to get the lowest price. Not wrong, but if we prepare from the beginning for that possibility, we don't have to sell bitcoin quickly, because of course with careful preparation we will be prepared to buy back bitcoin at the lowest price. Most people like that are not committed to what they planned at the beginning.