Well, if you do not want to accept the book you could just go to the store and see how much more you are spending in the last few months.
In the meantime, just in case, D.B., load up garden seed packs! (Turnips grow exceptionally fast!)
But if I followed every two-bit ecodoomic forecaster I'd have missed decades of wealth creation.
That said, M2 grew by $4t last year (even after accounting for the redefinition of savings accounts) so a robust and diversified portfolio of financial assets, consumables, ordnance, and some scotch is in order.
And yes, heirloom seeds wouldn't hurt.