This is a great piece for thinking about the future, but it doesn't really grapple with the problem of money and why it is centralized.
The essence of fiat money - the thing that makes it work - is that it is not arbitrarily constrained either by how much yellow dirt one can find (or plunder) or by some algorithmic source of artificial scarcity. People like to say that "scarcity" is a characteristic of money, but scarcity does not mean rigidity. Scarcity is relative; there must not be "too much" money. But "too much" money is determined by the goods it chases and the nominal prices they fetch. There is no need to build scarcity into the money, just into the process whereby it is created.
Money is scarce enough if it is limited by the credit of those who issue it. If you can produce something tomorrow, you should be able to trade tomorrow's production for something today, including the capital you need to produce your thing tomorrow. The currency of a prosperous society must work that way. If it does not work that way, it is obsolete, no matter how new it is.
Governments produce value, too, in the form of governmental service. That's why government can print money to pay for what it does. The Government's money is backed by the difference between (i) the potential outputs of the economy enhanced by what the spending bought, and (ii) the potential outputs of the economy without the thing the spending bought. That's why bad spending is inflationary and good spending isn't.
The future of crypto cannot be a retreat from creditworthiness as the ultimate backing for money. Any other limitation is inferior, because any other limitation prevents the maximum amount of goods and services from being produced. Lots of other things can prevent maximal production or politically optimal distribution, but those things have nothing to do with the currency.
The question, then, is not what crypto will become, but what fiat money will become. Maybe, it will be accounted for on a blockchain. But, outside of dystopias, it will be created by bankers against future outputs, and the bankers' assessment of macroeconomic limits on repayment - as in too many banks financing too many competitors will cause too many defaults - will be aided by a central bank that sees all.
In short, crypto must come to fractional reserving and central banking, not vice versa. And so it will, or it will remain forever just a way to move fiat from place to place.