If you like stable investment, you buy gold, if you like adventurous investment, you invest bitcoin, but I personally prefer to invest bitcoin, I want to bet, if the failure and then come back, I do not afraid of failure.
Investing your money into gold cannot help you earn anything good as the market value of gold is very much stable and it is better to keep your money safe in your account than that of buying of gold.
It is better to go for investing your money into bitcoin as this will only give you a chance of having a good living at the end but will also add more money to your account than you actually invested.