CNY displacing USD would entail allowing people outside China to buy really significant quantities of CNY-denominated financial products. This would entail CNY/USD changing so CNY is more expensive, because the default currency for financial products currently existing is USD. Which would slap a corresponding huge price increase with 0 increase in quality to all Chinese export. Which would murder Chinese manufacturing export. Which would entail laying off some grand proportion of an industry that employs 5% of the _human_ race. Which is why they're not gonna do that.

Same thing that happened to USD, right? Once the USA stopped having to actually manufacture things to get money, it stopped actually manufacturing things.

China is step by step learning that communism actually sucks and doesn't work.

Unless you can have a super intelligence that can monitor every aspect of everything all the time to ensure optimal decisions. Hmmmm...