There's one of these articles it feels like every month. And as usual, Betteridge's Law of Headlines is at play here.

There's no replacing the US dollar until a better option comes along. You need a currency that's open (which rules out Yuan), a currency that is backed up by a strong government (which rules out places like Russia, India, Japan, and the UK), and you'd want something that isn't subject to the same geopolitical rules as the US dollar (which rules out the Euro).