Its possible to dream up, of course. However, Bitcoin will never be able to oust and replace gold. Most people will always prefer gold over cryptocurrency, because gold is the eternal value in our physical world. Cryptocurrency is a relatively new phenomenon, especially from the virtual intangible world, which is far and incomprehensible to many people. It will take a lot more time for people to understand and appreciate the benefits of cryptocurrency, but this will have almost no effect on the value of gold.