Governments can control many things including national policies on many industries but they can not force citizens to do whatever they want. Citizens have freedom and they always want to have freedom so more or less, citizens in any nation will try to chase freedom and dislike unreasonable mandatory enforcements from government. Government can think a policy is good and serves citizens but if citizens don't see it helpful, they will have many other choices and ways to adapt to and stay away from that mandatory policy.
If you live in a communist/socialist country such as China, Russia, or Venezuela, then we could say the government can force you to do whatever it wants. Freedom (sort of) is only attainable in countries with a democratic political system (usually developed countries). But even such countries have their own restrictions (laws), so if you're caught doing something "wrong", you can easily face fines or jail time.
I'm afraid that Bitcoin becoming a legal tender currency worldwide, would only be a pipe dream. As long as it's not mandatory for mainstream use, merchant adoption will remain low. Probably forever. It's this reason why Fiat will always be the preferred choice for payments. At least, we're free to be our own banks with BTC. You can either use it as "Digital Gold" or as a currency. The choice is yours. One thing is certain, and that's demand for Bitcoin will continue to rise "for infinity and beyond".