Have you ever thought about Bitcoin becoming centralized someday?
For now i never think about that, or maybe bitcoin will replace fiat. Maybe what to be focus is how bitcoin can adopt by more people, or who made bitcoin illegal, can be make it legally although only to be as an assets. If a lot of country legalize bitcoin, in case like when people have bitcoin is not a crime, then we can think about bitcoin as payment all over the world.
Why? why are you thinking like that?
Bitcoin will never ever become centralized, why? Have you heard there's someone who modified the code of bitcoin which has a unique protocol that only bitcoin has? It is impossible to be centralized because bitcoin has its own unique feature and that is decentralized.
Besides, why do governments need to be centralized bitcoin? They have their own currency that can be used in a centralized way, not bitcoin.