Great questions .
Awesome response.
Not just blackmarkets either.
Bitchat has launched . Perhaps a developer can create a Hawala protocol / network layered on Bitchat.
I came across this in Lyn Aldens book - Broken Money.
Money doesn't move. Ledgers do.
Eg
1. If A in one 15 minute city needs to get sats to B in the neighboring 15 minute city.
2. A pays sats to a local Hawaladar (broker) based on trust and reputation who then contacts the receiving broker in B's location.
3. A's broker then sends a code direct to B.
4. B