Many Countries have put restriction and banning crypto currencies. In this situation which country you think is supporting crypto currency activities? where Exchangers and traders have favorable environment.
I don't know who is better, but one of them is Belarus I believe. As far as I know, they are very loyal to the cryptocurrencies. Miners are exempt from taxes until 2023, if I am not mistaken. A wise decision by the government to attract more investment in their country.