Bitcoins easily. Who invests in gold these days? Only people 50+ in my experience.
When my generation, the Millennials, wants to invest in a safe haven assets some time in the future, I think they will go for an asset that is more limited, transportable, divisible, fungible, easier to secure and easier to trade than gold, namely BTC. Not to say that bitcoin has greater potential than gold, which seems to go nowhere in terms of value.
i think people still know gold rather than bitcoin because they can see the physic of gold than bitcoin and we can see that gold is the best investment for them. but if they know about bitcoin, i think they will choose bitcoin than gold. and if bitcoin is introduce to more people, maybe bitcoin will become famous as the same as gold too.