You've got a point. I say President for eight years, then Chief Justice of the Supreme Court for life. I think she has good genes and might live to be a 105 years.
If the Dems run with Hillary, the Repubs could very likely counter with Janice. Your dream might become reality :-) Still I think a bird in the hand is worth two in the bush. After all, Supreme Court vacancies don't happen every day.