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.