Fake News on 4chan caused ETH to lose $4 billion because someone posted that the creator had died in a car accident.
4Chan post : http://boards.4chan.org/biz/thread/2608981
Definitely going to see the price recover now that he posted proof on twitter that he is alive.
Source: https://qz.com/1014559/vitalik-buterin-d...ums-price/