Bithumb and Coinone announced through a notice that they have decided to issue a caution notice regarding Across Protocol (ACX). The exchanges stated, "Across Protocol (ACX) has officially announced a proposal allowing ACX holders to choose between receiving a 1:1 exchange right for ACX and shares of the newly established entity, AcrossCo, or exercising a put option (Buyout) with a 25% premium," adding, "We ask you to pay special attention to investments in ACX."