Firstly, I'd say developed countries' option for USD over Chinese Yuan is pretty much set.
Secondly, I'm pretty certain that Bitcoin and other private digital currencies will have a good chance to be key currencies in the condition that the supply-demand relationship can be properly handled.
Thirdly, it may be a stretch to imagine, but the revised gold standard is a possibility.
Just some preparations for that.
Both of them have certificates issued by Japan Numismatic Dealers Association.
Buying gold watches is also a wise decision.
By the way, you can't count on India, the emerging country and rival of China, because of their quantitative easing and unstable economic situation.
Opt gold, that's for sure.
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