there are always a certain percentage of people in bitcoin world who just care about making more money using bitcoin which is why they think about selling all their coins on a small rise specially since this group have no understanding of what bitcoin is. in fact many of them have never even used bitcoin because they don't own a bitcoin wallet, they keep their coins on exchanges!
they don't represent the whole community even if they are the most vocal.
we see them mostly whenever there is a rise and also mainly when price gets closer to its previous ATH record. for example you could easily see loads of them back in 2017 when price reached its previous ATH (basically anything between $1000 and $1400) how they panic sold. it is mostly a mentality thing that they place these types of price levels in their heads thinking price can't go above it at all. $1200, $200, $24, $2, $1 have been some of those mental barriers!
bitcoin will continue being fine, keep growing and improve regardless of these people.