For years, Bitcoin evangelists have grasped at straws trying to explain what their digital currency is actually good for. As reported by Fortune, a purported ransom letter by the kidnappers of Today host Savannah Guthrie’s mother has demanded a $6 million Bitcoin payment in exchange for her return. Per TMZ, which received a copy of the note, the address of the Bitcoin wallet included in the ransom note is authentic. Whatever happens in the case of Nancy Guthrie remains to be seen — but it’s clear that her kidnappers chose Bitcoin for a reason. More on crypto: Bitcoin Is Crashing So Hard That Miners Are Unplugging Their Equipment