South Korean Crypto Exchange Bithumb Launches Payment Service with 'Asian Amazon' Qoo10 Through this new partnership, it will become possible to purchase products from Qoo10 and pay for them using the Bithumb Cache. The two companies initially signed a contract in August and proceeded to work with the Qoo10 settlement service and Bithumb Cache system. South Korea's leading virtual currency exchange Bithumb has partnered with Asian e-commerce giant Qoo10 to provide a cryptocurrency payment service, according to an official announcement Nov. 7.