If you you mean what would the last sat to ever be mined would be worth? Well. I certainly do not want to rag on Bitcoin's (generally quite good) fungibility, but I personally think THAT single Satoshi would be practically priceless.

Speaking more generally I expect a sat at that time to be worth, in today's terms, somewhere between a nickel and a dollar.

You may send my B-JDE token to this address! :) VJLE28uzPu7q4MzPSRYMSgHnofY6SxvKtjAZ2opQ7ypmsaXK8M2VDhCB6DkQ3yXNYAKvApYZNdANQXGY