Worry? Not really, depends on your expectations. The USD hegemony IS under attack, however it will take some time maybe three to four years , for the slide to occur….do note 30 countries applied for BRICs entry. It will take some time for their alliance to “ gel” up.
But make no mistake, China, India, South America and ME are 70 percent of the world’s population.
Do note Argentina ( which USED to be tied to the USD) has just paid off some debt in Chinese Yuan- a Harbinger.