>> tied back to some "news" from anonymous sources <<
It may have originated from the Andrew Left crowd, who are not only short-side, but 'activist' and aren't above making sure the bad news gets out. With Valeant the 'bad news' turned out to be totally correct, so it wasn't fake news, but other short side vultures have no qualms about floating outright lies.
Looking at the charts, nearer term support was broken today, so next support for Litecoin looks like 55, and then the band from 40-55 (roughly the summer trading range).
For Bitcoin there's some interim support at 3200-3400 area, and then main support would be 3000. For GBTC it's 550 and then the band from 400-550.
With the massive rise, a sizable retracement had to come eventually, so we'll see where things level out.