I guess 1 or 2 years ago, America was the country that has the most transaction in Bitcoin, cause Bitcoin at the moment was used by hackers on the deep web. But now things are changing cause Bitcoin are more popular for now and maybe Japan has the most Bitcoin transaction ? Because their goverment accepted Bitcoin as an official method payment maybe ?
The regulation done by Japanese government really helped their trade market. It shows how users are ready to switch pretty fast to any available means to make use of the digital currency and it is good. China though will still have a comeback and that is for sure with some regulatory policies and that should really cause some little boom or maybe the Chinese traders moving in back with Yuan.
Broadly speaking I see countries in ASIA starting to support Bitcoin. japan and south korea become an example of how Bitcoin began to serve as an important and regulated by the government very well. Compared to european and american countries then Asia has a high level of usage, many countries have large population levels and they are mostly interested in using Bitcoin. today is indeed the United States of America to be the largest country in the world both economically and otherwise, but I believe in the future countries in Asia will be able to be bigger and can also greatly contribute to the development of global finance. one of the ways it is done is to start adopting Bitcoin in their financial system.