Btc is Gold in what sense exactly? Gold is neither as volatile as btc and nor its going up constantly. Gold is being traded at its 2013 price while btc is at its ATH and getting new ATH's. I see no similarities between gold and bitcoin tbh. Gold has nearly unlimited supply too. Asteroids, the earth core, sea water all filled with gold.
gold in the sense of a reserve of value that has a daily trading volume that is pretty much irrelevant to the total volume of gold in existance, that is kept as a sign of strength, widely accepted for payments (not exactly, but anyway widely accepted a valuable), limited in supply (in fact bitcoin is more limited than gold), kept mostly by strong hands that are not selling at penies on dollar ever.
I think the comparison is quite clear and that bitcoin is establishing itself as an alternative asset that behaves like precious metals... perhaps you could argue that as a "rare mineral" due to voltility.