One possible way to implement this: Have on betting pool per person. When betting cryptographically commit to a time interval for predicted death time. After de

One possible way to implement this: Have on betting pool per person. When betting cryptographically commit to a time interval for predicted death time. After death bettors have limited time to reveal the time interval they bet on. Split pool among correct bets weighted by 1/interval-length. Making it easy to hire an assassin anonymously is why I find privacy preserving coins like zcash scary, despite valuing my privacy highly.