I think he's flatly wrong that crypto-currency original, main (only?!) use is using the money in a way others don't want you to. Sure that's a big feature (kind of like other monies, no?), but the actual reason was simply that we've been wanting digital money since the 80s and it's never worked. If the governments, banks, whoever had provided something that worked and could be built upon, we would have adopted it (Paypal (Thiel, Musk, etc) wanted to introduce something like this but.. meh). He says correctly that Bitcoin was a solution to "Byzantine Generals Problem" (I'm sure he read the quora answer one of my friends wrote years ago.. think I shared that somewhere here) i.e. trusting, sharing, and interacting with a ledger with those you can't completely trust. He doesn't really divide miners, full nodes, or users and how they each have consensus roles to play in the network (to be fair, neither did Bitcoin software; and miners do have the clearing/mining power after all). Him thinking miner A could just assign miner B's new block to herself as long as her cartel friends backed her is flatly wrong (for Bitcoin, at least).
"private innovates, public appropriates" seems correct. I think governments, banks, whoever will roll out their own digital currencies or public ledgers. You can be sure it won't be Proof-of-Work. Honestly a direct democracy coin/ledger has seemed to me an excellent solution; I may move to whatever country, corporation introduces it
