Jan 1, 2030
Will the Jewish population of the world be greater in 2030 than in 2020?
83%
chance

I'll use Wikipedia as a source unless somebody offers a better alternative.

For example, this page: https://en.wikipedia.org/wiki/Jewish_population_by_country

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YES payouts
Ṁ37
Ṁ13
Ṁ12
NO payouts