PoW is just for the money tho. the fact that almost none of the shitcoins have survived the likes of NiceHash and similar proves that there can only be one PoW, just as there can only be one base layer for bearer asset money.
WoT is not everything though. you also need small, private, semi-closed nodes across the network for communication, sometimes fully closed. i completely disagree that you can have fully open at all though. some people are still trying to run relays that don't put limits on use but it's something even Sisyphus would laugh at you for trying.
Auth. not just authentication (proof of control of the secret), AUTHENTICATION. asymmetric cryptography has three prongs to its utility: authenticating messages, authenticating connections (ie nip-42) and ECDH for secure secret negotiation without needing a one-time-pad.
1. authentication of users (to enable subscription access to relays)
2. authentication of messages (to prevent impersonation)
3. shared secret negotiation protocols (to prevent wiretapping and man in the middle attacks)
and then further down the stack there is IP blocking (only useful for short term mitigations against DoS attacks), rate limiting (when you can't block by IPs) but both of these measures are downstream of those three above.
let me just repeat again:
Proof of Work is useless for securing messaging networks.
Proof of Work is useless for securing messaging networks.
Proof of Work is useless for securing messaging networks.
i would hope that someone like you, Gigi, would know of Bitmessage. and if not, what i just said is the reason why. it has not created any benefit for nostr's security either. even if people tried to seriously use it for security, this would just create an opportunity for people to make a lot of money selling elliptic curve acceleration devices to lower the cost for better funded attackers (especially states) to completely destroy any denial of service mitigation utility from common users whose CPUs don't have these modular multiplication accelerators (and i can assure you, if people are stupid enough to try to seriously use it, they will become a product on the market).
and no, quantum is not a serious threat, not at least for another 40 years, assuming that the theory behind the quantum bit is even correct (which it probably isn't, because it assumes that the perturbation is uniform across all spacetime, which is a wild assumption if you ask me).

