Due to its limited supply and the fact that it is electronic, Bitcoin can both a medium of exchange and a store of value. Gold is a poor candidate as a medium of exchange. It is not easy to move around physically and you constantly need a expert to validate its authenticity.
I'll go with Bitcoin.
I mean, you can just transfer electronic deeds to gold. We also have awesome new technology like livestreaming that allows people audit and show people authenticating in real time. Decentralized blockchains are really cool but they also allow companies to be more transparent and honest.