I was thinking before that Chinese run the market and that is why news from that region do affects bitcoin in the most negative or positive ways. Japanese also have some influence but I don't think that they control the market as there are many factors that determine price.
Big countries decisions effect price of bitcoin because people think that if they are making decisions about bitcoin certainly they thoroughly investigate it and finally gave their decision. My country has banned bitcoin and I know it is for the time being but it will take long time that the government legalizes bitcoin in my country. China has banned bitcoin two times but now they allow their people to trade and invest in bitcoin.
In the end all news from China were fake, to much noise about nothing. In your country bitcoin is banned maybe but you are still here, they can't stop you from using crypto. Bitcoin is a world stage, I'm sure there are strong groups in every country, and individuals, they affect price with their actions but wellbeing of bitcoin is mutual for all. In big countries lives a lot of people, positive or negative news from big countries governments affect big masses, later their decisions affect price.
Bitcoin is still decentralized, nobody can fully control it, until bitcoin is decentralized we will not need to worry about who controls it.