Trading volume at Bithumb, one of the world's largest crypto exchanges, dropped by 40% in three days after it temporarily stopped opening new user accounts. The temporary stop was part of a "service improvement process" regarding so-called virtual customer accounts. A report from Business Korea on Tuesday, Aug. 1st, 2018, cited banking industry sources as saying that the exchange was forced to into the suspension because its banking partner, NH Nonghyup Bank, has yet to renew Bithumb's contract following the hack in June 2018.