Just for fun, plot BTC news relevancy from Google against the BTC value.
The two line up basically perfectly. Conclusion? BTC in the news means some portion of people hear about the great new BTC and how much it's going up in value, and some of them buy in.
Yeah, something's weird. BTC went up, not down, when Silk Road was busted. BTC went up, not down, when Congress started holding hearings on the subject.