It's just a guess and only gold in reality can be much more stable than the bitcoin.
No doubt about this that gold is more stable than bitcoin, in fact gold is present for long long time while bitcoin is a new currency so bitcoin is very much unstable. But it is also reality that the profit that bitcoin can give you, I do not think that anything else can give you. As I am interested to invest my money, bitcoin is a best option with me and I will always choose bitcoin instead of gold.