In my opinion As long as fiat money still serves as a medium of exchange, it will always be needed by the people of today and therefore it will always have a function as an asset to all of us. although the best value-keeping asset is gold but even though gold is quite liquid, it is no longer money that serves as an intermediary.
It would be good to use gold as payment again or at least money that is backed by gold. Now we are paying with printed debt. It's best to keep your assets in gold and cryptocurrencies in my opinion.
Gold is a bad way for payment because not every people can earn gold and it was really hard to earn gold now a days, cryptocurrency is much better since every one can invest if they have a decent amount of capital.