It's evident that an imminent pullback will have to happen, so I'm not surprised by the sudden drop. Strong support @$7k, and that is good, at least the bleeding has stop momentarily.
Every single time Bitcoin's price makes a rapid movement, people will start telling that it's a manipulation, simply because the price moved fast, without presenting any strong evidence for conspiracy. I think it's better to be skeptical and look for simpler explanation - for example Bitcoin can simply be volatile on its own, without any shadow groups pulling strings, because the market is novel, unregulated, has low volume and limited adoption.