Good. Shame on anyone who makes bets on human lives.
It never made an iota of economic sense -- if insurance underwriters are on the wrong end of that deal, they aren't doing their jobs very well -- but a number of large corporations would do it, and gleefully pocket the payouts when rank and file employees died.
A sufficiently liquid prediction market on a human life is indistinguishable from a bounty. That’s exactly why you can only take out life insurance if you have some reasonable financial stake in somebody staying alive and not the opposite.
Someone gambling on human lives is getting paid no matter what, though.