For the most part he is right. I would add that investing in guns and ammo is the way to go if you think things are really going to collapse (along with water filtration, food storage etc.)
I think some silver eagles are worth having. Right now, one would buy almost a tank of gas. I believe we will see them as black market currency before too long, at places like flea markets and other open-air trading places.
You’d have to have a LOT of money to need to stockpile gold. For barter, in an Armageddon scenario, I’m sticking with more practical currency—tobacco, coffee, salt, sugar, chocolate, and whiskey. (I’m keeping the wine for myself)