Bitcoin will never replace gold for the pure fact that gold is physical and will always have demand because it is a precious material that people desire, either to wear or as a method to maintain their wealth. Bitcoin has nowhere near the demand of gold in this day and age, with most people still scared to even invest into the technology. I think that gold will forever be a store of wealth an a great stable investment, bitcoin on the other hand still has a long way to go before it is even mainstream, which would the first step to becoming a stable investment. Until and unless it becomes mainstream and governments around the world accept it, it will never even have the chance of replacing gold. I truly do hope that one day it will replace gold, with the way technology is progressing at the current time, but I wouldn't be surprised if another cryptocurrency did it instead.