I don't claim that Bitcoin is a winner according to the criteria set out by Hayek, in fact it's obviously problematic as a unit of account as you explain.

The various decentralized stablecoin projects (disclaimer: I'm involved with one of them, MakerDAO) attempt to create competitive currency as laid out by Hayek, using collateralization and continual supply/demand tweaks to encourage a stable market price.

From that perspective, Bitcoin is indeed more like a trailblazer and a collectible precious metal, and not a serious contender for actual currency status. Still, it seems to have an important role in the ecosystem of denationalized currency.