There are specialists who say that the YUAN is going to replace the dollar, what would happen with the cryptography if that happens?
I don't think so that YUAN will replace dollar, if I'm not mistaken that's a chinese currency and American citizens would not agree with that. If just in case it will be replaced then bitcoin has nothing to do with it because of it's independent currency. No country owns bitcoin.
Its not quite possible, I know China has one of the largest markets in the world, but U.S has got some big backup and money flooding in from every angle. Every big company (not really all, but most of them) has got their headquarters in U.S, those that doesnt have their headquarter their, has a branch office. Its a strong nation.