It's up to you, but if you choose to buy gold.. you might end up selling it again or find yourself at the nearest pawnshop, or if you love collecting gold then it can juts put it in a much secure area of your house. ahaha
But when you choose bitcoin, then... there is a great possibility that you'll get much more than you have invested. It's just a matter of patient, hard-wok, and strategies.
Gold and Bitcoin is two different entity... Both have values depends on the market adaptation and volume. Basically both of them have potentials on pumping its value or worst case is having no value at all.