There are two common mistakes.
First, the dollar is not on the verge of collapse, nor will it be replaced by a crypto asset. The US is one of the world’s two largest economies and the center of the English-speaking world. It has the power to tax, the strongest network of alliances and the most powerful military. Yes, it has printed a lot of dollars since 2008, but it also has taken steps to lower the speed at which those dollars circulate.
Rates of price inflation are likely to be higher for the next two years or so, but already some of the immediate inflationary pressures are abating; lumber prices, for instance, are now plummeting. Over a 10-year time horizon, the US government can borrow at a near-zero real rate of interest, hardly a sign of a doomed empire.