Store of value is a narrative too. Nobody really knows for sure whether or not these assets will retain value, its all based on belief and the story being convincing.
You just described every financial asset out there. Tell me one asset which doesn't have its value based on belief and story. All of them has a story.
FIAT has value because USA tells us and they patriot the shit out of the countries which say otherwise. (Iraq, Iran, N. Korea, Libya...)
Gold has a story as well because it was being used as currency before papers started to dominate as we read from history books.
Bitcoin has its story too. (pretty strong one) It appeared right after the financial crisis in 2008 and it is a deflationary asset in the world of negative interest rates and constantly QE'd FIAT.
In all these, Monero also has a story. It is providing hardcore anonymity which is valuable as well.
The main problem here is, monero needs more of those story tellers who should convince people.