Crypto is tied to far more esoteric whims. Honestly the Fed has done an absolutely heroic job in the last 20 years and proven the USD to be almost indestructible. Crypto was founded for privacy, not for it's economic foundations which are still nonsense.
The dominant position of the USD on the world stage also might have something to do with the USA having deployed military to more than 150 countries at once and their involvement in regime changes all over the world.
Meanwhile the FED heroically partakes in piling on debt for the futures generations.
It's not so much that it's tied to esoteric whims but that it would destroy the economy if at some point were to become the primary currency, just like the gold standard did.
