China bubbles

"China is in the midst of “the greatest bubble in history,” said James Rickards.
So how is this tradable information?
If this bubble pops, what is going to happen to the USD?
During the GFC the USD strengthened on a supposed flight to safety but what if China tries to flog off all their reserves? Would this happen?

http://www.ft.com/cms/bfba2c48-5588-...1&fromSearch=n

short video on the subject

Excellent video, thanks.

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