they both are good source of investment but if we see for the long term perspective gold is less risky because it can be seen in early years that price of gold rises in 10 years very strangely. but if we see bitcoin as long term investment yes its risky but bit coin would go much high according to me but you have to invest in 5 years of interval.
Yes both can be consider as good but i think that if we want to make a quick profit then we must choose bitcoin, because bitcoin is in fact the best option to make more and quick income. While gold is better to saving where one can keep safe their money for a long long time.