When this happens
we wont be pricing Bitcoin in Dollars.
What will we be using, Chinese Yuan?
I thought you are advocating that fiat will collapse and is Yuan a crypto, no but a fiat like dollar. Dollar is usually majorly priced against any other commodity, asset or cryptocurrency because it is generally accepted and operated by the international trade as a measurement for pricing. Yuan can be uses within the Chinese setting.
I agreed with what you said because Dollar is a global currency and the statistics of the year 2014 shows that Dollar was used for over 51% international trading. Besides, most crypto market cap and trading volume listing site provide market price in Dollar and some Asia exchange site does the same either.
For fiat collapse, it won't affect major currency like USdollar because they understand the control system.
Every economic practitioner understand that fiat will collapse sooner or later and that does not exclude the Dollar though it may not be affected like others fiat that's why institutional investors join crypto. Do you think they easily join crypto because they like it? Remember they once said negative things about crypto which show their hatred toward Bitcoin.