Re: China’s digital yuan could replace bitcoin & end US dollar hegemony
Well, for that to happen... other countries currently supporting the US Dollar would have to agree to that and pledge their support for the Chinese Yuan or the digital equivalent of it. 
China being a communist country with an oppressive government will not count in their favour to get other countries to agree with that.
China are one of the biggest economies in the world currently and this fight would be very interesting to see. Who would be able to influence other countries to accept their currency as the global reserve currency.
I think a lot of the communist countries might support China and the capitalist countries will still support the US Dollar. 
Their neighboring countries will not agree for them to accept Yuan, just check the region where China is bullying its neighbor for territory expansion in the Philippines sea, the US dollar is still irreplaceable and there's no way Yuan can beat Bitcoin, because Bitcoin has a lot of fo supporters than the Dollar and Yuan combine. China being a communist country with an oppressive government will not count in their favour to get other countries to agree with that. China are one of the biggest economies in the world currently and this fight would be very interesting to see. Who would be able to influence other countries to accept their currency as the global reserve currency.
I think a lot of the communist countries might support China and the capitalist countries will still support the US Dollar.