This is true, but that's something that can take a thousand years to happen, as it has with multinational political systems or empires in the past, including the Chinese themselves. Financial collapse is not the same thing as economic collapse, though.  After all, it's just money we're talking about in a financial collapse, a mere contrivance for getting people to organize real resources among themselves. A financial system collapse is just a  collapse in one set of rules for doing things, and that can have real and severe consequences, but it can be repaired a lot easier than, say, an ecological disaster like we might face from unchecked global warming, for instance.