at that point the definition of humans would change, and I am not sure how this market will handle that... but most of all, there are not enough years to demonstrate that the human lifespan has doubled, so no

@HemanthSuryaGaneshKapa since this market is explicitly about events in the "next 50 yrs", the close date should be 2074 or something like that (since 2074 is what year it would be 50 years away).