I think there are no chance for YUAN to be able to replace dollar. Dollar has survived for hundreds years and it'll keep surviving for hundreds years more and the only thing can replace dollar is Bitcoin, I think so. If dollar falls of course Bitcoin price will increase very quickly and become the main currency all for all over the world I think so
I think for now we still can't use Bitcoin to pay for training courses out there cause Bitcoin is not legalized yet so if you want to pay for a training courses I think you should exchange you Bitcoin into cash and it's the best option for now.