The popularity of Bitcoin in the future will most likely increase and there will be more adopters compared to today. However the increasing popularity of Bitcoin will probably be a problem for governments because it will disrupt the distribution of fiat and it is likely that the majority of governments will not allow Bitcoin to become more popular. So I think whether Bitcoin will become the dominant currency in the future is quite unlikely because government regulations are increasingly strict. Moreover, until now most people treat Bitcoin like an investment instrument, so even though the adoption of Bitcoin is increasing it is not because Bitcoin is a currency, but an investment instrument with a good ROI.
Yes, that's correct. Governments may not welcome the dominance of Bitcoin in the future because it would lead to a large number of people using Bitcoin instead of their local currency, which is not advantageous for the country. They definitely don't trust Bitcoin as we do, so it would be quite hard for this scenario to happened, although it's not impossible.
I believe that Bitcoin adoption would be insane in the future and the community will grow a lot as Bitcoin's price increases once again and reaches a new peak imho.