dude what you are seeing is "volume" not "market capitalization"!
your question doesn't even make sense! market cap means circulating coins multiplied by the price.
if you want to figure out what is the "biggest crypto market" then you need to check out how much volume is coming out of each exchange located in different countries with different main currency. although that alone is not accurate but it is a start.
here is a good source:
https://data.bitcoinity.org/markets/volume/6m?c=c&t=aewhich shows USD is the dominating one, JPY is the second.
ps. I said it is no accurate on its own because sometimes exchanges report fake volumes. sometimes they have 0 fees which adds to their volume to unrealistic levels, sometimes sources like bitcoinity don't list all the exchanges so they may report some volumes so much lower than reality.
pps. also remember that USD being dominance doesn't mean US is dominant. because USD is used by so many other countries that do not have an exchange themselves. for example third word countries that are using bitfinex to trade use USD instead of their own currency or other fiat such as JPY, EUR,.... so it adds to USD volume.