The best possible uses for Nostr (created or not) in order:

1. TOR Coordination - Every nostr user or relay can optionally relay TOR as an alternative DMT.

2. Bittorrent Coordination - Every nostr user (in browser!) can store and relay bittorrent data. (This is important to use it as a CDN for the social medial layer)

3. Lightning Coordination - Lightning nodes can be coordinated much easier & more privately via automatic communications over Nostr.

4. Password Management - The best password managers are available to the whole web, just highly encrypted. Additional security can be had by Sharding a password file and keeping it on multiple different relays.

5. Bitcoin private markets - Other than lightning coordination, bitcoin can be Bought & Sold very privately a marketplace that uses Nostr to communicate it's order books.

6. Social Media - Clones of every social media site like instaG, twitter, FB, tiktok, blogs, etc all have their own apps or heck, why not combine all into one super app like Elon is trying to do?

7. Messaging - Better than Whatsapp/Line/Signal, Nostr allows perfectly secure & anonymous instant messaging. The frilly stuff may need the CDN again.