Recent complaints about large amounts of electricity, as well as the environmental pollution of bitcoin mining. Bitcoin needs to improve on these issues so it is possible that the future will be widely accepted and become one of the major currencies.
I don't know, but currently bitcoin is still often used as a transaction tool on the internet. it has even become a digital currency. however, to be a currency in a country, I think that is quite a difficult thing to happen. especially in countries that already have their own fiat.
I'm sure in the future Bitcoin will become a currency which admitted it by all the country. Now that has not happened because there are still many people who haven't knowledge about it, So making it difficult to set Bitcoin as currency in a country.