There's little downside in taking the pessimistic side of a bet with an enormous payout on the optimism side. I'm on the optimism side of that coin though. It

There's little downside in taking the pessimistic side of a bet with an enormous payout on the optimism side. I'm on the optimism side of that coin though. It's by no means necessary for a joke to have been made in the comment I was replying to, for me to refer to it. The cliché is well known.