My guess is hitting 10 000 was a milestone for a lot of people and it went as high as 11.5k+ earlier today then a whale sold off or something and here is the problem with a bunch of people who own a % selling.. they create a snowball effect and others panic and get scared and start selling. How low will it go? No one knows as for long term hodlers you have nothing to worry about : ). So just hold
Disclaimer: this is not financial advise trade at your own risk
In my opinion, Bitcoin is already so well developed that every drop will be a very big revolution. Currently it is worth about 11k so I do not think anything has changed so diametrically.