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.
Japan and Germany because the use of Crypto currencies of these two countries are free of tax and they full support the Crypto currencies existence especially the Bitcoin. In Japan every employee can now have the option to receive their salary in Bitcoin or in fiat but mostly they prefer to receive Bitcoin currency so that they could instantly to join Crypto currencies trading then in Germany the use of it is fully tax free in which it is in favor of the Crypto traders and investors too.