Facebook Inc’s proposed cryptocurrency has faced such overwhelming scorn since it was announced in June that an exchange is facilitating bets on whether the social-media company can come close to meeting its target launch date.

CoinFLEX, a crypto-futures exchange that launched earlier this year, is offering derivatives that pay out based on the likelihood Libra will be operational by the end of 2020. Facebook has said it plans to begin by the middle of next year but will not do so until regulators are satisfied, a substantial qualifier given the misgivings of policy makers from France’s finance minister to the chairman of the US Federal Reserve.