Your observation is valid that Bitcoin can potentially replace Gold as a store of value gradually in the long run.. However, it is important to note that Gold has been considered as an important asset and hedge against fiat currencies since the dawn of human civilization. Furthermore, a significant potion of world population is unfamiliar with Bitcoin, but they know the value of Gold. In this context, it will take long time before Bitcoin can effectively replace Gold. Therefore, it is a good suggestion to incorporate Gold in our investment portfolio to certain extent, thereby achieving diversification benefits.
Everyone has their own way and while it may be good for some to be in the gold, it doesn't mean others will agree.
The context of the initial discussion still leads to bitcoin so I think including other options such as shitcoin or other investments in this case gold has deviated from the path that should be the initial discussion because in the end when discussing other investments this will only make the discussion wider and make comparisons that are actually unnecessary.
I think our focus should be on the initial discussion where bitcoin is the main focus in this discussion.