I’ve thought about that for quite a bit 😄 open liquidity pools are one thing I think of

Long-term / future-proof content storage + sharing

With Nostr your content is not locked in a single place, it can be out there on many relays. It's something I was already looking for back in 2010 when I wrote my thesis called 'my digital lifeline'. I was looking for solutions where to store my personal stuff which would stand the test of time, a place which is likely to still exists over 20-30 years. When you take the network of Nostr relays as a storage place, I give it a good change that my stuff will be there over that period of time.

Login with nostr isn't big enough. Wish we had better key management and signers.