TP will be gold if the SHTF. As will all other basics.
If there was a cheap and easy way to store cigarettes for years, I would by a bunch of cartons and stash them. Health concerns aside, when you have anarchy no one gives a damn about the long term health effects of tobacco. And those that want it, want it dearly.
I have a case of cheap bath soap bars stashed in my attic along with a 6 months supply of TP and paper towels. Also stashed are matches and cheap butane lighters.
Here’s one no one seems to think about. Aluminum foil. An incredibly useful and versatile item that can never degrade in storage. Buy enough to last you 10 years. Unless you die, you will use it. If you die, well, who cares.
No matter what you stash, if it is worth anything you will have to defend it. You know what that means you have to also store?
Good idea on the aluminum foil...aluminum is almost up there with the other “investment metals” like copper, platinum. Costs a lot to produce (electricity).