Thank you all for the comments !
Without entering into a long debate, I will answer in essence.

Unlike many apparently theorists here, I actually pay for real goods / services quite often, just like my friends do it and NOBODY pays for coffee in BTC, but we pay in BNB and based on ETH tokens! Expensive fees and transaction time of 60 minutes does not allow using BTC as a real currency of payments, but a means of savings.

If someone knows which retail outlets in large quantities, and not singly, accept many daily payments in BTC, send a link to their wallet please, to see the massiveness of transactions, please, but I know that no one accepts BTC in large quantities, due to technical inconveniences

And now another good example is that even the relocation of miners from one country, China, has already made 50,000 transactions pending for more than 24 hours! Nobody will wait for payment for real goods / services for more than 24 hours sitting at the checkout!

But my post is not about the inconvenient technical characteristics of BTC for a real currency of mass payments, but about already implementation of monetary policy with real currencies, such as ETH and BNB, by analogy with the monetary policy of the Central Banks of the offline world.