Yeah I show him my spreadsheet each month to point out how well my money in the market is doing but he's very conservative and probably wouldn't invest. Maybe because saving money feels like a sacrifice to him, he's not comfortable with the idea of losing any principal. And I can't really do a hard sell telling him he should invest, because I can't take responsibility for any money he loses in the market and each person's risk tolerance comes down to what lets them sleep at night.
Yep, this is where the anti-consumerism pillar really matters. I'm like, "But when you spend all your money to eat out for lunch, you're losing 100% of your principal! And not getting anything in exchange!" Him: "But you're getting lunch in exchange!" Me: "Right, like I said, you're getting barely anything in exchange."
Thanks for the idea, though!