Well, I don't see the point of actually comparing gold and Bitcoin side by side. Today, we are already away from the gold standard so that most countries are not anymore basing the value of their currencies to the gold they are holding, though there seems to be a movement to get back into that standard probably to experience again the known stability and safe haven provided by gold.
Gold is gold no matter how we may like or dislike it...this is something physical and there are many uses of gold that a digital one can not do. Now, the same thing with cryptocurrency there are advantages and benefits that gold can not offer. These are two are good assets to invest with, though Bitcoin is known to be volatile (and we are experiencing it now with its upswing movements) while gold is more of a steady type and because of this the return on investment can never be that so high.
Right now, gold is not the world currency so is Bitcoin. And it can be taking a lot of time and circumstances before anything can be replacing the might (though depleting) of the USA Dollar. The future is something we can never know though we can speculate and even wish. Let's watch on what can and will be...and that can be an exciting thing.