These top countries will be dominating cryptocurrency trading and exchange for the next many years. What is significant here is that China remains to be a big force in this marketplace even if their government has had been waging a war on cryptocurrency (though they love and expanding on the blockchain technology). I am wondering why Japan is not figuring that much though am sure that Japanese are top crypto-loving people too and one of the first to recognize Bitcoin. Another significant fact here is that it can really be so lucrative to do cryptocurrency exchange business though this is getting to be very competitive now that there are already so many players on the market and more can be coming.