There are doomsday prepper magazines, which seems like it would be a poor business model if they were right, what with it relying on future issues coming out to sell advertising.
My perspective has been that if things really do go to shit to the level of what peppers believe, financial stuff won’t really matter unless you’ve invested in setting up a self-sufficient compound. And even then, owning such a compound would likely be as much of a liability than an asset because unless there’s many such compounds, you’re going to get swarmed by anyone who hears about it, so you’ll also need security forces and equipment to defend it.
And if you have a small army on the compound, good luck not getting couped by them.
A business venture like a magazine would be completely irrelevant if society ends. But it might make a decent income in the time between now and the end. And it’ll be kinda like religion: once anyone is in a position to find out how good any of your advice really was, they won’t likely be in a position to get upset with you if it was all just made up.
I dunno, sounds pretty good to me. If you’re wrong, there’s always the mystery of what the future could bring to sell your magazines. If you’re right, you’ve suddenly got a huge list of addresses for people you know are probably well stocked with pretty much whatever you told them they needed.