"Stock to flow" doesn't work on ANYTHING that's not a real commodity or resource.  You can hoard all 21 million Bitcoins and the rest of the world can completely ignore you like you don't exist because NOBODY actually needs Bitcoins for anything.  It's a fake, imaginary commodity aka a Keynesian scam.  If I hoard all the physical silver in the world, people actually need it for things, the stock to flow metrics actually do function, and I get to charge whatever the market will bear.  A real commodity money grants you power, a fake commodity grants you zero.