It isn’t a narrative. Bitcoin stores purchasing power into the future by virtue of its engineered scarcity.
That’s just what Bitcoin does.
You couldn’t use Bitcoin for day-to-day transacting historically because blocks were often full and transactions were expensive. No-one is going to pay $20 in fees just to buy something small.
We needed lightning to get built out before it became useful to the world as a medium of exchange. Lightning is still actively in development.
We’re all very very early