I don't mean to offend people who do love blockchain tech, in many ways I don't blame you. But is this feeling I have somewhat common? I'm not even sure how to justify it.
1) the optimal supply of money is externally determined by the needs of commerce for liquidity,
2) new money can be created to meet the needs of commerce through public loans secured by real property pledged as collateral without any fixed artificial limits on supply
3) money may be circulated with an expiration date to discourage long term hoarding,
4) general governments should retain the ability to suppress the private issuance of bank notes and regain public control of the circulating medium of exchange in order to emit unsecured notes to pay for defensive war expenditures in the event that it cannot obtain loans from private banks and it is existentially necessary to do so
So some of the ideals espoused by blockchain activists may clash a bit with that.
Real and Useful: people can use the money as a store of value, medium of exchange, and a unit of account - and enough people believe in it.