If everyone in the world gets into crypto and cryptocurrency will become an official global currency, do you think bitcoin then will stop depending on fiat currency? Or will it just co-exist with fiat?
Bitcoin does not depend on fiat. We use it to measure the value of the coin. Here valuation using fiat does not mean it is dependent on fiat. It is totally independent of fiat influence. We just use it as a reference frame to measure the value of the coins. We can also measure it using some other coins too, but does that mean it is dependent on that coin? Nope. And yes, the chances of them co-existing is very high.