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.
They are both good investments. Gold will not depreciate it's value as the price will continues to grow in a little percent. You need to secure this assets in a safe place that will add the risk if someone knows that you had plenty of this Gold. Unlike in Bitcoin the price is volatile in nature. The opportunities are wide as you can diversify your assets to grow more. It has no physical properties but people are buying on it in hopes that the price will grow more as time goes. Investing in bitcoin is risk but the return of profits is exponential as it will goes 2x or more.