Gold will probably be a bad investment but a great compliment to crypto. Crypto is all about inefficient redundancy. Security and trust over efficiency and output. Gold is the same thing.
It would also be a bad idea to invest in solar panels and greenhouses. We don't do it for the investment: we do it because it will be all we have left if the greater system fails. Of course I've already made this opinion clear like half a dozen times so maybe I'm just trying to convince myself :D