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.
I think gold can not be replaced by bitcoin because gold is based on how much gold is worth its value than bitcoin we do not know how to increase or decrease bitcoin sometimes quickly decrease bitcoin sometimes fast also rise bitcoin is significantly different than gold can not be replaced by bitcoin gold.