Ok i got one,
Betting
📑
It would be cool if you could present a bet as a nostr note,
similar to polls and invoices.
You still have the oracle problem but with nostr you could nominate a third party or group of npubs who state the outcome (or even vote on the truth) perhaps some fedimints could provide this service?
Alternatively you could connect it to poly market backend perhaps but nostr native would be better.
Initial event could be an offer which could be accepted (or counter offer made)
Then optionally, it would be cool if additional participants could join in, either duplicating the bet or merging with one side... Which would require an equal addition to the other side.
Could be cool