Today many countries accept bitcoin as a virtual currency, is it because bitcoin is so high that they think bitcoin can change the country's economy, or because the country has many bitcoin users already?
I think I've seen similar threads already.
Yes it can, but it depends how you understand improvement. If you expect it to make the country richer, better situated economically, compared to the rest of the world, I doubt it. Though I think it can improve the distribution of wealth among the people, which in a way improves the economy
I essentially agree with that point
That Bitcoin can change the distribution of wealth among the people, but somehow I still doubt that it will be able to "improve" it. You seem to mean that it will reverse the flow of wealth from the poor people to the rich ones. I guess this is nowhere near the case. Technically, Bitcoin is yet another speculative asset, so if anything, this will just move wealth from less profitable folks to more profitable ones. And those who are rich have more tools to be profitable since they just have more money and can hire more qualified and experienced advisors. In other words, Bitcoin is not particularly different in this regard, and on the whole it can't change the situation when the poor create wealth for the rich
