I'm not sure it's been mentioned yet but could this have had an impact on the market too ?
https://decryptmedia.com/2018/11/16/sec-icos-a-no-no/

https://decryptmedia.com/2018/11/16/sec-icos-a-no-no/

All these shitty ICOs will just move to Europe, out of the jurisdiction of the SEC, where they can continue to scam people all day long.
Caveat Emptor.