Crypto schemes certainly deserve much of the scorn that has been poured on them recently, but the way things are trending with the $US dollar may not be all that much better. Modern Monetary Theory, which is widely embraced in some circles may not be much more reliable than crypto, and in particular the fact that MMT relies on preserving the reserve currency status of the dollar isn't always recognized clearly (this is why MMT applied in countries like Argentina and Venezuela results in the devaluation of the local currency).
The fact that the Fed's rampant quantitative easing during the pandemic has now contributed at least in part to rampant inflation might indicate that that reserve currency status is faltering (compare to QE during 2008-2009, which did not cause an inflation spike). It's not the only factor driving inflation (supply chain breakdowns, fossil fuel exports, etc.) but it's something to think about.
No - don't sell your Treasury bonds to buy bitcoin, please. But perhaps it's time to think about reviving Bancor?