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?
First, hardly ever all people will use crypto currency, at any rate, it can happen not earlier than in several decades. Secondly, the official global currency of the crypto currency can only become for ordinary people, I do not think that the states and state structures will make wide use of the decentralized crypto currency. If this happens, the decentralized crypto currency is not dependent on fiat, and will not depend on it. The Crypto-currency can only go in parallel with the national paper money of various states and can not replace them. Therefore, it will coexist with the fiat.