The hole world in panic cell right now so it's genuine thing that investors or holders are also in panic and it is normal in this situation. People want to survive form this deadly situation that's why they don't care about what's they've got in past few years, they are just selling every thing and trying to move forward. And expert people take those chance for big profit. Actually this thing is define between expert and panic people.
We have been through MANY situations like this.
Why would that be the last?
Of course it won't be the last time. Bitcoin is not a dead/shit/scam coin that's why it's moving up and down. If it was scam then it was long gone like other shit projects. It's sad that after all years people talk shit about btc. Well in my guess either they are scammers or they are too much newbies whom don't know what are they talking about. And i also agree with you that, it's really matter of time when btc rise up again. We saw before and it'll will happen again for sure.