This is the question that always being asked by many people, for me if you have so many funds and money, diversifies your wealth, invest in both thing,s or invest in many things so that you will have a choice. Gold price is continuously growing after so may years, each karat is precious as time passes by it rises, in bitcoin, there will be ups and downs in the price but it will always pump, but not stable. So it is up to you, bitcoin can be converted in different coins as well, which is good you may scalp and arbitrage, it will all depends on how much money you are holding and also what is the current economic status.