No, it has no self-agency. If you let it be by itself it wouldn't do anything because it is a tool that requires prompting, and outside of being conversational it has no degree of sentience.
I would never use something like this. Seems to me that it's just a heuristic based on the char diff count. I made a simple repo that has a shell script that does rm -rf /usr/old_files_and_stuff, added a space next to the first slash and it was approved, which is dangerous. If I need to manually verify it anyways for stuff like this, why would I use it?
You have contradicted yourself. By your own admission, Bitcoin is backed by the world's energy and computing resources (at least what is used on the network)
You're going to be waiting a while, even now these models can't get the details right. Look at all the example pictures, everything is just wrong. You can obviously see what it is trying to get at, but it can't get there. Another example of the last 10% taking 90% of the time.