Group 1 - Upbit has initiated a coin listing spree in response to Bithumb's increasing trading volume, having listed seven tokens in the past 10 days [1][3] - As of September 9, Bithumb's market share reached 46%, while Upbit held a 50.6% share, indicating a narrowing gap [1][2] - Upbit has historically maintained a market share above 80% but is now facing competition from Bithumb, which has formed a partnership with Kookmin Bank [2][3] Group 2 - Upbit's rapid response to the trading volume growth of Worldcoin (WLD) included listing WLD within hours of its market share increase for Bithumb [4][5] - The total number of listings by Upbit in September has already exceeded its total for August, indicating a significant increase in activity [5] - Experts express concern that the intense competition between exchanges may lead to hasty decisions that could compromise the review process for new listings [6][7]