Many people take a popular view that the USD are junk, and fled to other currencies for safy. They are kind of right on the first part - USD is junk, but they missd the second part - other currencies are much worse. RMB had being abused by the goverment for long time.
I am not sure when will the bust happen. My gut feeling is when the USD:RMD reaches 1:5, the crash will be near.