Prepper's Guide to Wealth is primarily concerned with preserving wealth. And there are kazillion ways you might attempt to do this - some good; some not so good. Saving cash, cryptocurrency, or precious metals are possibilities. As are owning stocks, bonds, or real estate. And how about a foreign bank account? And what's the Chicago Plan all about? And negative interest rates. How do we deal with those?This book describes each of these things (and much more besides). Nothing is perfect, of course, but you'll walk away with a decent understanding of what you're faced with. And the author has no ax to grind.

He's not a gold bug. He's not an evangelist for bitcoin. The book gives some simple, straightforward history, some personal experiences, plus  clear explanations of risks and rewards. You're apt learn a few things. Find it eye-opening. And (I hope) consider it money well spent.