I am thinking that crypto market cannot be manipulated by the few of individuals or even groups or organizations so therefore some articles were trying to prove that there is a possibility that the crypto market were being manipulated in so many ways until today.
And Yes, I do believe there are some players somewhere in between each points.
I don't think they're trying to sell into lower value intentionally but they could manipulate the crypto market by exploiting the investors reactions through FUDs, like publishing fake news just recently India is banning Crypto Exchange while they're actually not.
situations like that is also an act of market manipulation, I believe.