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.
managing to invest both would be slightly complicated and when you do realize that one of them are better,you will move out from the worst one among those two,you will eventually figured out which one better.