Can Bitcoin ever be use as other country currency and it will still maintain it decentralized digital currency?
Bitcoin can definitely be used as a currency in nations, to put it rightly, bitcoin is already in use in several parts of the world to pay for services, pay for goods on msme platforms and lots more. Even vpn platforms accept bitcoin as a means of payment too.
What I doubt is a country adopting it as an official currency. Nations will prefer to have their own centralized token.
Indeed as I stated in my previous reply, Bitcoin can be a personal option to use as currency but the government won't render it as an alternative currency next to their national money due to the fact that they cannot control the flow of BTC. They can implement control on the third party services but never on the core chain of Bitcoin. As we all know the government hates and fears those that they cannot control completely so them letting people use BTC in their country and acknowledging BTC as an asset or legal tender or mode of payment but not as an alternative or main currency is just an act of taking advantage of the popularity of BTC and to take profit from it. And it is obvious that this kind of adoption is half-hearted.