The perceived value of gold as a store of value comes in part from the fact that humans have been using it as a means of trade/store of value across a vast span of cultures for many millenia. Bitcoin has been around for 8 years. With Bitcoin there is no guarantee that competing technologies won't spring up to replace it in the mid- to long-term. Gold will always be gold.

Also, gold is shiny. Personally, I'd much rather have a gold bar in my safe, that I could take out and hold in my hands, than a memory stick with some Bitcoin on it.