No one really knows the truth if there is a group manipulating the price but with it's unusual movements in market lately it's pretty much suspicious why did the price suddenly fall then goes up. Let's look at the facts according to crypto news there is an 120 billion btc and altcoins that got stolen, google & facebook banning ICO ads, countries regulating crypto currencies. I guess this could be a more viable reason.
Connecting the dots to arrive at a theory on how the market has been reacting to certain scenario is a lot of serious work which I doubt someone would.want to invest his time to bring out information that could be disregarded as conspiracy theory so when reading articles like this, which tends to want to provide answers, it should be done with an open mind to want to identify some of the salient things and pick only the relevant ones.