Okay so I understand that bitcoin's price is increasing/decreasing by its utility, its rarity on the market, how it is publicly perceived, innovations, media, investors exc..
My question is, who decides the price of bitcoin? Or any other cryptocurrency? The cryptocurrencies have value because we believe they have values. But who are the we here? Who changes its values hourly sitting in front of a computer?
I am asking, who is the guy or the group of people who changes the number that's on this link ?
Also this comes with further questions. The people who decide value of the currency can also try to manipulate it(increase/decrease) by their own interests right? For example if they have tons of bitcoins sitting in their wallet, they will try to increase its value so that they benefit economically. I mean, who would not do that?