Who do you think controls the supply, DeBeers for example? What dictates the price of Diamonds? Surely the cost of mining determines the rock bottom price regardless of its supply. You should move past Econ 101, maybe start with Dr. Seuss
Who controls the price of Bitcoin? Bitmain, Tether(Bitfinex, willyBot 2.0), and soon Intel
bitcoin no doesn't work like that.