Coinone, South Korea's third largest cryptocurrency exchange, is reportedly up for sale. The exchange's major shareholder and chairman, Cha Myung-hoon, is considering selling part of his stake and exploring various options. Cha and his company currently hold a 53.44% stake in Coinone, while Com2uS owns 38.42%. In a related development, Coinbase, the largest cryptocurrency exchange in the United States, is set to visit South Korea this week. The visit aims to discuss potential equity investments and collaboration opportunities with Coinone and other major local companies.