Pseudonymous trusted reputation systems are very much needed. We can use blockchain tech to build such. They already exist but in more ad hoc ways. We also need ability to roll keys including Nostr keys and provably knows in it is the same underlying reputation bearing entity. Nost keys as they are are not very secure and definitely not a basis for knowing you are dealing with same trusted entity.
The interesting hard part is crossing from digital to physical space. For modern parallel economy it seems to me we can be limited to what was historically proven only as the scale is not there.