On July 14, Celsius Network’s mining unit, which said in March it planned to go public, also filed for Chapter 11 bankruptcy protection, along with its parent company, in the U.S. Bankruptcy Court for the Southern District of New York. Meanwhile, Poolin Wallet, the wallet service of one of the largest bitcoin (BTC) mining pools, has announced on Sept. 13 it will issue IOU (I Owe You) tokens to affected customers after it froze withdrawals prior week.