Permissionless doesn't mean much if it's not anonymous (central authority wants to stop you from doing x; sees you doing x with non-anonymous coin, punishes you).
I understand the appeal of anonymous currencies like Monero (hence why they are banned from exchanges), but beyond that I don't see much use for crypto
Fail to see how you can do it with a database with existing financial rails - the costs are too high
All the same financial rails apply to crypto - enforcement is just lagging a bit.
E.g., you could do what World of Warcraft does - Gold can be earned/exchanged in game, and can also interact with the real world in nebulous ways. Using the hyper advanced technologies of relational databases and ignoring financial legislation, they have enabled ultra-high-throughput microtransactions, with the added benefit of not spraying the public ledger on to the desk of every law enforcement agency on the planet.
Literally described the use case - a medium of exchange between agentic entities at massive global scale