I think in terms of the number of users/owners of Gold and bitcoin, that of bitcoin should be more. I take my analysis from the levels of people who use both.

For Gold, it is usually the wealthy's pride. Gold is mostly used by the rich who see it as a store of value and class. But, bitcoin is not a class commodity, every strata of human community, society and persons can have access to it.

The popularity of bitcoin is more because it also plays a dual role of store house for affluence and also for payment purposes.