The Bitcoin network is the first truly global payment system. It respects no borders, is never closed, is owned by no one, and is accessible to everyone. Now people still invest more in Bitcoin than use it.
If Bitcoin is allowed to be used globally by governments, that will be the pinnacle of Bitcoin. Can bring convenience to people. More people will use Bitcoin. Bitcoin needs to be allowed by the laws of each country to become a world currency, otherwise it will be very difficult.
But unfortunately, that will never happen. Dreaming of bitcoin being mass-accepted by governments as a world currency is indeed an impossible task. Currently, only 2 countries accept bitcoin as legal tender and both are struggling due to weak economies and mounting debt. They're betting their economy on bitcoin because they don't have a better solution either. But for countries with strong economies, there is no reason to get rid of their own currency and adopt a decentralized currency. Especially the US, whose USD is considered the world's standard currency, will never let this happen.