Here's a great place to learn more: daveramsey.com . He's a radio guy, with Christian-based financial advise. Don't worry, he won't beat you over the head with the Bible. But he offers great common sense guidance on how to get out of debt, how to live within a budget, and how to make your money work for you. It is not 'prepping', but it's just as good if not better.
BTW, if you think silver/gold aren't valuable post SHTF, do you really think cryptocurrency will be worth a lick? Precious metals are good as some of your last prepping items, but 95% of preppers are not to that point.