Changes will never happen in a single day. Its take worth time. people are accepting bitcoin more then yesterday. Number of people who are using bitcoin going up everyday. may be it will never happen that all people accept bitcoin but there is no doubt that most people will accept it.
Yes that's for sure that all people will not really to get into bitcoin. But in the end those people will be forced to use bitcoin.
If the government will implement the cashless society and the currency which will be use is bitcoin.
i'm sure government would rather make their own digital currency which is centralized so they can control it than using bitcoin which is uncontrolled if they're forcing their people to implement cashless society