None at all, I think, each has a factor that causes prices to go down and up, Gold is super stable and hardly up or down, while on the other hand, Bitcoin is a decentralized currency that makes it fall and rises in price a lot.
if my answer is wrong, I think it is just a coincidence.
I think we can use the bitcoin as a currency, but the gold cannot be. So the price of bitcoin will be more than gold in the future.