I'm betting on the full amount of pain and misery that he can inflict on us, 701 - 800 days.
I think that he's rejuvenated with his definition of a midterm win and will run again but lose, especially if Trump announces that he'll run again, Biden can't resist the rematch.
Honestly, I hope the hell that I'm wrong. Every morning I wake up and turn on the TV hoping that Joe has passed away peacefully in his sleep.