Bitcoin is unfit for the role of global currency. Firstly, its potential global adoption will be vehemently resisted due to the environmental concerns associated with PoW mining. Secondly, it's the volatility - the global currency needs to be more or less reliable and not swinging like a baseball bat. Lastly, comprehending prices for some cheap goods in sats with all those zeroes is honestly too hard.
Exactly. The fact that Bitcoin is decentralized, greatly minimizes its ability to be used as a global currency. Countries will be reluctant to abandon Fiat altogether in favor of Bitcoin. What will happen is that both Bitcoin and Fiat will live alongside each other for generations. One thing to remember is that Bitcoin was designed to be an alternative to Fiat (not as a replacement). I'm fine with that as long as decentralization wins in the long run. Who knows what the future holds for this exciting cryptocurrency? Just my opinion

For me, There will be no such thing as a decentralized currency. Which is the reason why I will never think the government will even consider Bitcoin as there currency or an alternative for fiat. I agree that bitcoin and other major crypto will live alongside each other and it will not be considered as alternative or replacement for fiat. However, I have second thoughts for centralized crypto and stable coins which I think may have a chance to be an alternative for Fiat.
could there be mass adoption of bitcoin will it be more stable than it is now, I think if the holders are spread out it might become more stable, and it is possible to use it as a currency, but to go in that direction I think it's still difficult for now, with the system decentralization, the government does not seem to want to be ignored, and for crypto itself it is impossible to turn into a centralized system