To boost Nostr users, challenges include:

1. Difficulty in handling private keys.
2. Users drop off, uncertain about who or what to follow.

Solutions:

1. Introduce disposable private keys that auto-discard after 24 hours unless saved by the user.
2. Improve user navigation by categorizing public channels, similar to 2chan, for easy topic discovery.

Enhanced organization and categorization through public chats could revolutionize Nostr's usage.