It just seems a natural fit. I have read about how people in Asia have been buying and selling (using fiat) seamlessly through whatsapp for years.
+1. In my old city, local buy/sell Telegram groups were popular. You could find anything there (products, jobs, rentals, local events). Informal, KYC-free and for cash.
I wonder if there is a group feature for Nostr (users can join a group and only group members can see the messages, maybe a relay could be configured like this?).
It would be nice to have global marketplaces, as well as private local marketplaces for villages/cities/regions (e.g. food from local farmers, taxi/delivery services, rentals, jobs, events).
Will be interesting to see what apps can be built on Nostr's relay/client/post structure.
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Vishalxl did some work on encrypted group chats with NIP-38: https://github.com/nostr-protocol/nips/pull/59
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