2) Your ability to mine cash off this physical quality depends on the inability of this quality to be reproduced.
3) This quality can now be reproduced.
I would think very hard and very long about staying in this particular business. Personally I think there is still plenty of work left because not everyone is happy with going full sci-fi dystopia, but it will be niche and scrappy.
"I have unique characteristics that make me an excellent programmer. I earn money by tweaking for-loops. Recently, GPT is being able to tweak for-loops better, faster and more cheaply than I can. How can I protect myself in case companies decide to replicate my unique abilities?"