I suggest you return to your economic and history books. Gold has no intrinsic value as you would probably call it. It is only because of some VERY distinctive properties that are not found in other metals that gold was ultimately selected as the better store of value available. Its only value comes from a market agreement.

Bitcoin is essentially the same as it replicates the same properties of gold while having a more predictable supply and features that allow it to be used more commonly as a currency, unlike gold.