You've been here in crypto since last 2017, and that kind of volatility is already known to everyone. But just to wonder why it surprises you because we have this thing all the time and since the day it was been in the market.

Asking for a reason? There's a lot and we can't change this feature anymore. And as the number of crypto users (traders/investors) increases, the more it becomes volatile but I think, majority love to see this and this is also the reason why these people make money from here.