It is estimated which currencies are most in demand when exchanging BTC.
Investopedia, with reference to Coinhills, talks about which currency users prefer when exchanging Bitcoin, as of mid-February 2018 on the basis of information from more than 120 exchanges.
The Japanese yen (JPY) is the leader in this segment, with a share of 60%. Japan became the leader due to the move to the Japanese sites of Chinese users who were subjected to repression in their homeland.
The US dollar ranks second with a share of about 25% of the market. In 2012, the dollar was the largest player, but in 2014, the Chinese yuan pushed it to second place. And now the dollar is inferior to the Japanese yen.
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Japan opens their country in cryptocurrency recently but it seems like Japanese people will make a way to lead other countries. We all know that Japan is veteran in using technology and I think their being mechanical prodigy is useful in cryptocurrency. Another era that will opens for crypto, a lot of experience and opportunity will come also in crypto enthusiast.