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.
Actually it is very difficult bitcoin to replace paper currency because paper currency will be ingrained with human being to be used as currency of expenditure center as well as transfer tool to each other, so I think bitcoin only become shadow of currency kertan for daily use, though bitcoin is very famous today.