Gold existed very long time ago. For many centuries it had been discovered and having worth or value that can be used as a means holding and even for trading and for body accessories. So many are already holders of gold not only as stocks but as jewelries passed for centuries. If you can see countries also have jewelry stores and fronts. Compared to bitcoin it had existed only a decade ago to count the years would be not enough to compare its holders for both. We know that holding bitcoin could be more value than gold but not accessible to all the people. I mean not all countries yet have full online cryptoworld trading and exchanges. So some only were able to invest earlier were getting the worth of it. So I think it is not easy for people holding bitcoin could match the gold holdings in volume and even in worthiness.