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.
Bitcoin is unstable but as you can see, the prices always go up no matter how many times it has been dropped. Therefore, risk takers live to make money with Bitcoin. Many people have become rich just with buying and selling Bitcoin. Well, I have to learn this method to have some stable income lol. Actually, I do not like gold since it is physical and moreover, we can not use it as a type of currency.