Bitcoin and Fiat will most likely coexist for a long time. In this transition phase, USD is a short-term UoA, MoE, and SoV and BTC its long-term counterpart.

In this scenario Fiat and Bitcoin equal to:

A telescope and a microscope.

General relativity and quantum mechanics.

But in the long run, for money bitcoin can do billions and sub-cents and is becoming the best thinkable combination of a microscope and telescope and like the holy grail of physics the Quantum Gravity Formula (aka the World Formula).

There is no second best 🥇