Bitcoin started with essentially novelty and "collectibles" value, like baseball cards or celebrity signatures or fine art pieces, but doesn't depend on shifting interests or demand to justify its underlying technical/foundational values of decentralized trust.
The comparison to digital gold is apt, especially if you don't stumble on the red herring that gold has physical industrial/commercial applications beyond just being shiny-and-rare-and-has-history. But, physical gold has pitfalls too: https://asia.nikkei.com/Spotlight/Caixin/Mystery-of-2bn-of-l....
What is the economic value of being able to 100% prove via battle-tested cryptography, that you own the asset that you say you do? What is the value of the technology behind being able to do that? The token's value is simply a proxy for the technology. Bitcoin being a store of value doesn't mean that, a bunch of idiots keep convincing each other that it's more and more valuable; it really means that, the global economy recognizes that they'd rather have provable ownership over X amount of bitcoin, then some equivalent $Y amount of fiat.