This is such a great question! Hopefully, it inspires people to sit down and total up their net worth. It's a great exercise, and I usually discover that I have more than I thought I did.

I think the answer to your question can be determined by playing out probabilities of outcomes. For each probable outcome, you should have an investment. There are infinite probable outcomes. Here are some examples.

Do you think regular commerce will be happening with Bitcoin in the next 20-40 years? Buy Bitcoin.

Do you think there will be an economic collapse in your currency/region? Buy some coins of precious metals.

Is there a good chance we will be corralled into using electricity for most of our energy needs? Buy LiFePo batteries, and something to charge them with.

Do you think it's possible that all headlines are distractions, and that "business as usual" may continue with its ups and downs? Buy some stock, learn options, and all related disciplines.

When you have enough investments to buy real estate. Buy real estate. There are smart and dumb ways to do it, and plenty of opportunities. Until we terraform, it's as limited as Bitcoin.