There used to be a lot of FUD when Bitcoin value was declining but now it is common to see FOMO (Fear of Missing Out). That's why a lot of people buy BTC when Bitcoin reaches its new ATH because they think it will grow even higher. Unfortunately, some of these investors sell their BTC when Bitcoin price decreases, it is known as panic selling. Personally, I believe that Bitcoin will be worth a lot in the future. That's why I'm not afraid to buy it every time I have spare money, even when we are just at ATH.