Gold is useful if you want a conductor that doesn't tarnish over time. It's price is probably dominated by jewellery/cost of extraction. It's value is most likely sentimental, if not downright mystical.

I personally think it's a bad investment choice. I think Bitcoin (and cryptocurrencies in general) are forcing a dialogue that's making people consider what value is and how it's applied. I don't think Gold will make the cut when we shift paradigms.