Bitcoin in Asia is quite popular compared to the western Continents. This is all because of the increased acceptance and the people easily using it an way for getting an additional earning based on its legitimacy. In my thinking bitcoin will be growing high than expected as there is tremendous increase in adoption around the Asian countries.
I'm not quite sure about the number of usera, what I know is that the news and updates about cryptocurrencies in these countries ( Russia, China, Japan , Indonesia, Philippines ) that is using cryptocurrencies are quite high and there are some whales here that can affect the prices of cryptocurrencies, not mentioning that the Russian government ( but only a part belongs to Asia ) is open in regulating cryptocurrencies and Japan too. Well it is originated in some unknown person ( Nakamato ) but the number of new coins are mainly originating in Asian countries and I can conclude that cryptocurrencies and Bitcoin is quite popular in Asia.