I can’t really think of a better, more concise pitch for cryptocurrencies than “ideally you could just have a foreign bank account that your country cannot touch.”

I'm sure you forgot that your country can send a uniformed guy to seize said foreign bank account on a whim. Or you think you'd keep it for long, while being roughed (or simply stored) in a dark cellar?

You are misinterpreting his comment. He is saying that the idea that you need to store your money in a foreign bank account to keep it safe is an argument in favor of cryptocurrency, because that way you don’t need to rely on a foreign bank at all.

This is a great pitch for digital privacy as a global standard as well.

It partially solves the problem of not trusting your own government.