The US Dollar isn't going anywhere. Even Putin in Russia came out after Trump secured his victory that Russia would not stop using the US Dollar for international trade, something that is honestly very good for the US. The less we can see divisions in the world, the better.
The government is going to do what the government is going to do. It doesn't matter what I think or what objections I have. I just wanted to put them on the table. Fiat thinking is where most of our real problems come from, and I'd love it if we stopped thinking in those terms entirely. But that won't be for another few decades.