If you read closely, “cash” (dollars) won’t be worth much. You need something with “hard” value like land or precious metals. Think of things that will retain it’s value globally. THAT is the best hedge against a dollar meltdown.
I agree about diminished value to an extent, but when in a period of like we’re talking (confiscation or ‘freezing’ of accounts) having cash is still better than numbers on a piece of paper with your name on it. Yes, land (I own free and clear), valuables (metals, ammo and firearms) other durables, are good too, and getting my hands on cash doesn’t mean that I wouldn’t look for the best I can get under the circumstances. Think about how screwed you’d be if the IRS froze all your credit and bank accounts.....the same thing could happen to your paper retirement accounts.