If you are in the US, you can buy I-bonds [1]. You can only purchase up to $10000 per person per year in electronic form, and $5000 more in paper form. So, if you are married, you can invest $90k in 3 years. If you have kids, it appears to me you can open minor accounts for them, and invest in their name as well, but I'm not 100% sure.
I didn't do that myself yet, but I plan to do it.
Quote from the Treasury website:
What interest does an I bond earn?
A combination of a fixed rate that stays the same for the life of the bond and an inflation rate that is set twice a year. For bonds issued from November 2021 through April 2022, the combined rate is 7.12%
The article suggests 3-4% inflation moving forward instead of 1-2%. Do you really need to hedge against that? I would say buy stock in companies with strong demand and pricing power.
Gold is a likely a bad idea. There's a good chance that post-crash, governments around the world will demand your Gold to back up the digital money they're going to force us to use. There's no guarantee they'll pay you for it. When trading Gold is outlawed for regular citizens, whatever Gold you have becomes worthless.
Try Silver. It's comparatively unlikely that they will pull your Silver.
Try mining stocks. Stocks don't vanish post-crash, unless the company dies. Unlikely to happen with miners. When Gold & Silver goes up, mining stocks will likely go up as well, despite the rest of everything crashing.
Best time to buy either once everything crashed, or simply now due to the fact that your money becomes worthless anyway.
Or try Cryptos. The top cryptos are unlikely to go anywhere. Ethereum is close to PoS, Bitcoin is ... well ... bitcoin. Unlikely to go anywhere.
Personally I recommend looking at how you can feed yourself (or others) next month and the ones after.
It's also important to look at things in regards to not just what you can do now, but how it will help you post-crash. Preserving your current wealth and being able to transfer it into the post-crash-era is pretty much just as important as making sure you have food and water. You really don't want to end up with nothing, without at least trying.
Yes, I know, it's all pretty much a gamble, unless you belong to the group of privileged people who control this shitshow.
I didn't do that myself yet, but I plan to do it.
Quote from the Treasury website:
[1] https://www.treasurydirect.gov/indiv/research/indepth/ibonds...