a lot of opinions about this, if I personally more convinced that the media that determines bitcoin price.
because every time the news appeared unsightly in the media. at that time the bitcoin price drops.
I do not know, that's just my personal opinion.
There is no such one organization or company which is controlling the bitcoins. As bitcoin is decentralized, no one can control it and no one has any power to manipulate it. The price is purely depends upon the demand and supply of bitcoins. As demands increases and people want to invest in it, the price automatically rises.