Great until you bump up against that 7 transactions per second limit, the entire planet adopts it and and you get to wait multiple decades between transactions.
And before you say “lightning network” do realize that LN doesn’t exist and even if it did your solution is to avoid using bitcoin. Setting aside you still have to make transactions on the bitcoin blockchain before you can even play ball with LN.
Bitcoin/cryptocurrency is a giant scam marketed toward libertarians and certain STEM types. Why Facebook decided to hitch its horse to a giant scam is beyond me.
You think the LN doesn't exist? What? There are dozens of LN visual explores out there. Who told you this lie?
The whole point of using LN is to use Bitcoin as a settlement layer. You make one initial transaction to open a channel and that's it. In the future users will onboard directly into LN channels anyway. On chain scaling is still important. Ethereum 2.0 will likely do over 10,000 tx/sec. Don't know about Bitcoin.
In any case, the US isn't the only country in the world with a monetary policy that could get trampled over.