What will the price reach by the time the mainnet goes live is 2 months?
It's a mystery and no one knows. It will be the answer that you will be getting.
All of us are speculators and are waiting for the price to go up at any price that it will do. And to know what will be the price after 2 months or once the ETH 2.0 goes live, there is no such exact answer to the price you want to see. Any answers that you will be getting are speculations and guesses.