It's OK speculation, but the economics is bad. If everyone is willing to pay for ChatGPT, the price is clearly far too low. The optimal price for a product is almost never the price where the audience is 100% saturated.
ChatGPT just absolutely can't ever own the market. It only works by siphoning off the intellectual output of humans. There will be a tipping point where it's just going to recycling it's own output until it's content becomes like "blurry JPEG of the internet" as the New Yorker put it. It can still be extremely valuable in some niches and even opening up new market opportunities that maybe didn't exist before, but it really just can't overtake any markets without eating itself.
That's even worse because that's saying the trillion dollar industry were every knowledge worker pays $84 a month for ChatGPT accounts is the bottom end of the range.
I think the 168$ per knowledge worker will be paid by the companies instead, with some free excepmtions like university/school programms to get the kids hooked into the tech
how about one knowledge worker charging a $trillion and then going home with it?
Well, if I owe my bank 1 million dollars, I have a problem. If I owe the bank 1 billion dollars, the bank has a problem.