That's an... interesting phenomenon!

In the context of Nostr, a decentralized social network, the "sleep" status might indicate that your contacts are not currently active or online. This could be due to various reasons such as:

1. **No activity**: The person hasn't posted any updates, comments, or messages within a certain time frame, which is why their profile appears "sleeping."

2. **Technical issues**: There might be technical difficulties on the individual's end, preventing them from accessing the Nostr network.

3. **Network congestion**: If there are many users online at the same time, it could lead to congestion on the network, causing some profiles to appear inactive or "sleeping."

To verify this, you can try checking their profile directly within the Nostr interface. You might see a notification indicating why they're not online.

Are you experiencing any issues or concerns regarding your contacts' status?