I believe that gold-covered "gold standard" currencies are the solution to most economic problems and if linked to the cryptos it would be great.
In these currencies, gold will replace the guarantor of those currencies "Price" and the encryption "Blockchain" will be the criterion of transparency.
Until then, the Bitcoin is a good option against all central currencies, but it is terrible as daily use. "makes it an investment."
If we are going to use gold we need to use it directly, no more proxies or what it is happening today will happen again, people exchange freedom for security and convenience and that is a very bad deal, people got tired of carrying gold and preferred to carry papers without value, once governments convinced people of doing that fiat currency was inevitable.
This is why bitcoin is great it has many of the advantages of gold with many of the advantages of fiat so I really think that once some of the problems are ironed out bitcoin will become a very popular currency in the future, so it is possible that in the future the competition about which is going to be the most popular medium of exchange is not going to be between fiat and bitcoin but between gold and bitcoin.