Okay, I wasn't going to do it, but I'm going to do it. I'm going to drop the conspiracy theory thing.
I do know that the major exchanges have LARGE holdings of bitcoins. And I assume they themselves can put buy and sell orders into the market (with it being fairly anonymous).
That's not a conspiracy. It is called price manipulation and anyone with a large stack can do it.
Concpiracy is the OP thinking that aliens and governments are behind the recent rise.