if it is your opinion that this bet would allow excessive risks, then it is your responsibility as the owner/operator of MoneyPot to disallow such bets from being placed. As the owner/operator of MoneyPot, it is your responsibility to ensure that your bankroll investors are not exposed to excessive risk.
The problem is he (and probably all the investors) didn't know.
It is his responsibility to know. If this was something that he did not fully understand, then he should not have allowed these kinds of bets in the first place.
(AFAIK) dooglus, nor RHaver are the ones who own MoneyPot, therefore it is not their responsibility to make sure that bets do not expose MoneyPot bankroll investors to excessive risk