Gold has long stood and will stay for long. Gold is physical. Gold can be passed to future generations. Gold can be worn. There are multi-purposes for gold, whereas bitcoin serves as a asset as of now. Although, its variety of use may increase in the coming days, it still has a long way to go to attain the place of gold.
Gold is very old, whereas bitcoin is very young. Gold doesn't have to do much to stand the test of times, but bitcoin is not like that, it has to evolve and we will have to wait and watch that.