if I personally think all that will not happen, the government will definitely not give permission to make bitcoin a world currency, even though there are countries that accept bitcoin and make bitcoin a legal currency in their country, but they still use it. fiat currency for their daily needs, btc is already very popular, so let it go hand in hand with fiat, let us both take advantage.
The likelihood that this will happen is very small, you are right. What government are you talking about? About world government? Is there such a thing?
I think that none of the existing governments of strong and developed countries, and not dependent ones with a destroyed economy, like Venezuela or El Salvador, will allow bitcoin to be made official currency of payment. To make
BTC a world currency, these countries will have to somehow agree among themselves, and this is practically unlikely, because even on more minor issues they can't reach an understanding. Therefore, I have no hopes that
BTC will be used as a world currency (officially and at the legislative level). But there is good news. Bitcoin has long been used as a world currency in any country on the globe unofficially. People from anywhere in the world can use
BTC as a currency without the approval or permission of any government. So basically it's already happened.