A recent science fiction [Br] novel imagined wide-spread betting on science and technology questions, supplanting horse racing in popularity.

And I have developed a board game where players use such a market to bet on a murder mystery as it unfolds.

Life insurance and commodity futures markets [Ro] were both prohibited by anti-gambling laws until advocates managed to obtain exemptions.

ISN'T GAMBLING ILLEGAL? Yes, betting markets on science questions appear to be only legal in Great Britain, where they are highly regulated