We really need to build a P2P bitcoin exchange on top of Nostr. Things like Robosats, Bisq, and Vexl are nice, I've used many of them extensively, but they're also ripe with fraud abuse which can get your accounts in trouble when trading with the wrong person.
We're almost all bitcoiners here and there is a wide mix of people looking to either accumulate or sell bitcoin. We could use the web of trust with Nostr to find people within our trust circles looking for a partner who we could regularly exchange with. Similar to the idea of Vexl, but rather than needing to find exchange partners via our phone's contact list, we could use our Nostr follows (which are already public) to find trusted people looking to exchange with. From there, all exchange details can be done privately through encrypted communications.
Obviously you can't fully stop fraudsters, but being able to find exchange partners among the people in your community you trust would go along way toward facilitating P2P bitcoin trades which is really needed to help bitcoin fight KYC. I think Nostr is in a prime position to help facilitate this.
