*They can't watch my bitcoin transactions.
*They can't steal my bitcoin physically from my house.
*I don't need banks to put my bitcoin in safe. We use electronic wallets.
Very easy why bitcoin has supremacy over gold and other metals.
I also believe that those reasons are the main criteria for becoming a popular platform than Gold. basically, Bitcoin has some a special feature about security and transaction. not only that, Bitcoin also providing huge value or price rather than gold.