So astoundingly wrong.
Ask the Weimar people. The Powers That Be can, and do, print little pieces of paper with neat ink designs on them. And they will print until the world is awash in pretty toilet paper if they feel like it. Gold is rare and the supply cannot be exponentially increased by the whim of some central banker(s).
FWIW, a FRN, whether a 1 or a 100, has 12.4 BTU heat value. A stack might prevent frostbite after TSHTF.
You are correct in the "food, water and ammo" department. Don't forget smokes.
Nope. Gold is a luxury item for when civilization is on kilter. When civilization gets knocked off kilter, as happens every few centuries it seems, then gold is nothing but a lump of yellow metal that is a pain to haul around everywhere. It only becomes valuable again when people start thinking it's valuable again.