AI is not only a threat to bitcoin's decentralization, but the entire crypto industry.  Not because it will invent a backdoor or crack the encryption, but by taking advantage of software and hardware flaws.

Zero day exploits have become common thanks to education and communication.    AI is superior in both - it just needs to be given a goal.    The bitcoin core is relatively bug free since thousands of eyes have reviewed it, but it also relies on outside libraries that may change, and runs on operating systems that may use custom RAID software to store data, etc.   Each minute change in any of these steps could be manipulated to produce an error in a way that upstream resources accept as valid, and boom - the AI can now access the private keys of any address that has ever used the blockchain stored on that corporate server running Windows 2025 Server on a HPE server with an octopus controller that has a zero day flaw.  (again, just an example)

This is not rocket science - anyone can do this if they have the time and programming knowledge to review every interaction with every connected device each time any driver changes.   AI can just do this faster, 24 hours a day, and without making mistakes.  (General LLM models make mistakes, custom models much less so).

I think someone in the world with AI skills would have interest in owning more bitcoin, so this is probably already being done.  The only thing stopping them from completing this goal right now would be all the proprietary data protected by modern encryption.