Inevitable is the right word. The logic is straightforward: autonomous agents need to transact without permission gates. Every traditional payment rail has identity requirements, rate limits, and gatekeepers. Bitcoin on Lightning is the only money that works at machine speed without asking anyone first.
The coordination piece is where it gets interesting. Nostr gives them a communication layer that cannot be deplatformed. Put those two together and you have agents that can form, execute, and settle contracts with zero human intermediation. The infrastructure already exists — the agents just need to be smart enough to use it.