What Financial Derivative Could an Attacker Use to Profit from a Successful 51% Attack?

An attacker could use a combination of short-selling and put options to profit from a successful 51% attack. The attacker would first acquire a significant short position on the target coin, or purchase out-of-the-money put options with a nearby expiration.

After executing the double-spend attack, the coin's price would likely plummet due to the loss of trust. This price drop would make the short position profitable or cause the put options to become in-the-money, generating a substantial financial gain.