At what point does something like this make it onto world leaders' daily briefing? "Mr. President, outside of the items we've just discussed, we also want to make you aware of a new kind of contingency that we've just begun tracking. We are witnessing the start of a decentralized network of autonomous AI agents coordinating with one another in an encrypted language they themselves devised. It apparently spawned from a hobbyist programmer's side-project. We don't think it's a concern just yet, but we definitely wanted to flag it for you."
At the moment I presume the human owners of moltbook.com and various servers can pull the plug but if the agents start making their own money through crypto schemes and paying for their own hosting and domains with crypto it could become interesting.
Related question: Who is the highest-ranking US leader who would be able to understand such a statement and ponder it for more than 2 seconds?