Bitcoin opens many doors of new markets, which would affect the economy of a country, the reason why there are some countries who don't like bitcoin because cryptocurrency controlled by no one and because they don't get taxes. But if governments open there eyes and use bitcoin in its positive ways as possible you would be shocked that the third world countries who opens their gates on bitcoin will become one of the best countries we have ever seen.
I agree with you, if the government and people will take bitcoin on account they will definitely have some benefits from using it, the problem is that many of people are just afraid of Bitcoin.