By that definition dollar is not a currency in China.
You have to realize that there are many currencies, and they all have their niches. Bitcoin is just one of them.
You have to realize that there are many currencies, and they all have their niches. Bitcoin is just one of them.
Edit: Since I was downvoted I realized my comment wasn't clear. When I said you can't do "that" with Bitcoin I meant transfer my USD life savings to Bitcoin and then go to China and transfer it to yuan.