$5 says that this is a ploy to get trump to soften his trade ware rhetoric with the eu; once (and if) democrats retake control, they'll switch back since sinophobia is virtue in the west.
The question is whether the EU can actually survive the next four years. My bet would be that there's not a chance in hell of Trump softening his policy because he viscerally hates EU on a personal level. These people openly made an enemy out of him, and he's a very petty man.
france and germany have a better chance at keeping their fascists out of their government than the united states; if they manage to keep that firewall up and keep importing russian energy through back doors, i can see them surviving.
Highly unlikely that China would have any desire for the yuan to become a reserve currency since they want to be able to control its value on the global market. What's far more likely is that we'll see a BRICS backed currency along the lines of Bancor that Keynes advocated for emerge.