I can only speak for myself, but I do not feel any particular predilection towards "social consensus" when I'm told that a think has cryptocurrencies mixed into it. If anything, it's a negative signal that tells me that someone has undisclosed financial interests in whatever they're trying to tell me about.
Sure, the argument made by crypto people is that is a transitional condition and in a few decades society at large will in general consider information on blockchains (or their descendants) as authoritative in many situations.
Sure, I can understand the vision. I guess the more salient "why?" question is the one that still feels lacking to me. Current easy money aside, it's not clear why society as a whole would be willing to cast aside the last 250 years of physical ownership and financial infrastructure in exchange for digital ownership(?) and immutable ledgers with irrecoverable error conditions.
Sounds like the same fallacy as preppers getting ripped off buying Krugerrands at a premium to keep value safe after a complete collapse of all civilization. When it is like putting platforms on the boughs of a tree to stay safe when the trunk is cut and felled. It fundamentally misunderstands the order of dependencies.
I think that’s actually it’s own fallacy: presuming that one can predict the dependencies and survivorship of various elements of society in a scenario where one or two larger ones go through a disruptive transition. This is a contradiction in many cases, because if you could know how such a disruption was actually going to play out, it would be unlikely to actually happen. If our kids are growing up in a world that is fundamentally different than ours in terms of sovereignty, it is very hard to know what the side effects of that transition will be.
You’re presuming a scenario where the structure of government changes is the same as a civilizational collapse. That’s not a given.