Lee Sirgoo, CEO of Upbit's parent company Dunamu, will step down on July 1st Lee Sirgoo, CEO of Dunamu, the operator of the South Korean cryptocurrency exchange Upbit, announced that he will step down from his position starting from July 1st. Lee stated in a statement that he made this decision for personal health reasons and to embrace new challenges and changes in order to support Dunamu's next phase of growth. Despite stepping down as CEO, Lee still plans to continue serving as a consultant for the company. Dunamu will announce his successor later.