Why would the world shift from a currency that is economically and politically entrenched via trade and treaty? What would Bitcoin solve that the USD doesn't?

Why would the world shift from a currency that is economically and politically entrenched via trade and treaty? What would Bitcoin solve that the USD doesn't? Why would the world accept a technological "solution" whose implementation already contains dire technical problems? What makes you think hyperinflation is a realistic outcome? If I grant you a world that decides fiat model is Bad, why would they choose a system that is inherently centralized? One whose early adopters and hoarders have been manipulating the crypto-currency market for their advantage for years? One whose transaction history is public to _everyone_? One that only has a handful of gatekeepers, that have been proven to work with governments and have been caught delaying transactions to profit from the change in the price in Bitcoin?