I would choose bitcoin because you can make more profit with bitcoins than gold. Gold will be gold and bitcoin can even become bigger then it already is and it is still becoming bigger also the price of gold can become stable and the price of bitcoin cannot.
I prefer investing in bitcoin also because I know that in bitcoin I can earn more, in case or emergency I can withdraw it anytime I want, gold is good but since it is law regulated that is why its value is not that good, you are also earning but not too high but it is good also if you have investments in gold as you can also en cashed it anytime when needed.