I dont think so. In the end game Gold is still a precious metal and a beautiful thing in the eyes of a person. Bitcoin is a different story as it is a very good way to make transactions so as for the better currency the bitcoin would be best of two as for my opinion.
We do not know if bitcoin wil replace gold but I think there is a possibility that it would happen. Furthermore, as of now you can see the great potential of bitcoin so that there is a chance that it would happen and Im very glad if its happen. Lastly, gold and bitcoin has a different story and gold wil a precious metal and bitcoin will become our world currency in the future.