People loosing money not only because of hackers it is a down trend started several months ago and i am afraid BTC return back to 1 k again . imagine how many members at that time will left us here alone in darkness age.
I don't think it's possible to sell at that price again ... there peoples that bought bitcoin at 19k$, no one will think to sell it at that price even if they leave them rot in their wallet.
in my opinion it does not make sense between bitcoin prices with hacking exchange because I do not think both of them have a hook, the ascending and declining bitcoins are not affected in the hacking crash.
bitcoin and other coin alt follow market development, if market is lonely i am sure price will go down and when market is crowded bitcoin and other coin will go up.
bitcoin falling below $ 7000 is common and there is nothing you need to worry about because it is a common thing that often happens and if compared with 2014 bitcoin fall so deep but you can see now and you can judge it yourself.
Not only Bitcoin affected but even all other altcoins ! What explain this ? and this arrive in the same day (What other event can make this?).
And it's already happened before when exchangers has been hacked.