There have also been some reports that the current sharp price drop in Bitcoin and the entire crypto market is as a result of the 100,000 BTC that was allegedly dumped from a wallet associated with the Silk Road.
I've only seen speculation on Reddit and clickbait stories to support this theory. I haven't seen anything particularly convincing. Any blockchain evidence that shows these coins went to exchanges? If these were controlled by the US government, they wouldn't be dumped on exchanges of course. They might be auctioned, though.
Markets thrive on fear (and greed, but that's another story). Major BTC movements (triggering high bitcoin days destroyed) have always fed into fear, like any other FUD, e.g. that news about Goldman Sachs earlier. I don't think these coins were dumped. People are just fearful and panicky.