when there is good news bitcoin can be very expensive and I think it's normal movement and when bitcoin has bad news so many people panic that makes a lot of people who sell their bitcoin
that is something that is common in this activity, because the desire of each person is also different as you say, when the price goes down it must all panic to sell, because that sense of panic cannot be eliminated when the time is urgent. moreover the need has also been waiting so it's natural to panic when prices go down.