Sure. But having to convert to pay taxes and debts is huge pain point for trying to conduct all your business in a foreign currency. It also adds transaction costs.

If you are a business, why would you ever try to run on bitcoin alone? There would have to be a huge advantage. And we see that in many small cottage industries where that is an advantage, like buying drugs online or illegal gambling.

But without the need for pseudo-anonymity why would anyone ever use it? Why would your grocery store use bitcoin over dollars? They wouldn't.

So crypto will probably be a currency in the long run, but it won't overthrow regular fiat.

Plus, if there was a huge benefit to crypto, the Fed could just do a crypto dollar and peg it to the real dollar.