I think @ray and civkit team are on to something where there is an underlying protocol for all the ethical p2p btc marketplaces, where nostr plays the nym and coordination layer. Maybe if robosats, bisq, hodhodl etc built on a common protocol there could be increased liquidity. 

nostr:note1udl46m72u4hxgdue7gtp7vw3eaze52k4tr53ds52a49e490pazwqwl8s0y