Yuan has been more stable than USD decades.
Chinese military capacity is growing at a rate that alarms all honest US military experts.
While China does not have the direct experience of military aggression that the USA has, its military hardware is fast approaching and will soon eclipse US in most areas. 
Housing collapse cost US hedge funds mostly.
$1.2 annual trade SURPLUS beats US decades of fiscal and trade deficits.
USA is nearly insolvent.
Nobody wants USTs.

Solomonsatoshi

Considering China had shown no sort of stability for their currency and have zero projection power…. That’s China trying to dig out of its second  catastrophic building collapse in what 5 years? That’s what 25-30% of their GDP