DIVERSIFICATION is the answer hahahaha. Both of them, but if i have to choose between them, I would choose Gold because is a commodity (a tangible asset) and its value has remained through the history
If i have the option to invest in both and i have the funds for that,then obviously i have with both of them.But for me right now bitcoin is much better because it can be used as a currency as well as investement also,and is good for small investor like me.