Although gold has some use cases, most of the value of it is consequence of a large number of speculators that drive the price. I think the future of gold is uncertain, even as a way of storing value. If, in the long run, Bitcoin proves to be a stable and safe currency, many people using gold to store value are likely to start using Bitcoin.
It will not happen that for sure,even in future ,gold will still remain unbeatable.bitcoin is the beginning but it will soon replaced by others as transaction time is huge and cryptocurrency can not be stable if it become stable that it will be similar as paypal or any other digitalcurrency.