It is a good idea to take into account all factors affecting a market, even if some of that news might be influenced or biased or has some agenda - it might lead to some opportunities that might arise that may not otherwise have been there. But yes everything does need to be taken with a grain of salt.
The news has a huge impact on the cryptocurrency market so the mainstream news can completely help the market recover after a long period of decline. Because the market is small compared to its potential, I am very hopeful that there will be new sources of investment that will help boost the market.
News these days are even impacting less on market movement as people now tend to rely on technical details than fundamentals and probably just add up the two together to make a trade.
Mainstream media has always been there just to make money, so it is not surprising when we see them come up with unverified news and we all know that the digital age has even made that easy anyway as any Tom, Dick and Harry these days always end up going into Journalism without any knowledge about the ethics et al.