Value is a social relation, not an object. It is impossible to design a foolproof "store of value." Money under the mattress is depreciating paper, gold is just

Value is a social relation, not an object. It is impossible to design a foolproof "store of value." Money under the mattress is depreciating paper, gold is just a little mineral pebble, fiat money and shares are just contracts, the less said of crypto the better. The closest you can get to this ideal "store of value" is to take the general idea behind ETFs and take it way further to find ways to "invest" in society itself, but in a much more multi-modal way. If done properly, unless society started to somehow fall apart, you would always be guaranteed returns. The key thing is that because you would be investing extremely broadly, the notion that you're privately owning this or that company or bank account would begin to vanish. This is, of course, just a financial way to describe socialism.