In
Critical Path Bucky is pretty clear that he very much does not expect government nor big business to accomplish any such path, but also that it is a new kind of revolution, really an evolution, based on design science rather than ideological argument or persuasion.
Basically it has to be such a good solution that it would be stupid not to do it except of course for vested interests whose horse-and-buggy or whatever will appear less valuable in light of the new thing.
Which presumably actually depends upon scale since I am fairly confident that an old-style horse-and-buggy likely fetches a better price now than it did back in its heyday but the scale of how many one can expect to sell per year to Hollywood or who-ever might still like to have such a thing might despite population increase be less than in its heyday.
Equivalent functionality, depending on which theoretical function one could use such an item for, is likely much cheaper nowadays though; at least Bucky's premise is that that is the intended case.
I think a crypto for UBI should be fixed total number ever issued, the idea being to increase its value per unit to accommodate more beneficiaries and/or more value per beneficiary, rather than ever minting more.
Benefits could come solely from transaction fees.
Driving up the value would be done simply by buying units of it, or maybe rather, for benefit of CoinMarketCap type sites, by building an ever-stronger ever-deeper "buy side" for it, merely offering to buy rather than actually buying, but the offers being there so anyone having any could choose to sell to such offers (aka "dump" or "dip").
The big problem remains getting hold of stuff to build the "buy sides" out of.

-MarkM-