that's not how market psychology works. you're being far too rational. irrational despair and exuberance dominate markets, and emotions dominate traders.
so here's what usually happens: those people who bought at $15k? they think rationally like you for quite some time. but the price drops and drops and eventually, they start to wonder if the price will ever recover. then the crash accelerates. panic ensues. these once rational hodlers who were so strong at $8000 are suddenly so much weaker at $5000 and below.
these are the bulls that sell the bottom on high volume in bitcoin's classic v-bottoms. then they provide lots of buying power on the way up when they want to recover their coins. you should only devote yourself to hodling if you can actually keep your cool during crashes and avoid selling into bottoms.