Argo Blockchain announced that CEO Peter Wall is stepping down after serving the company for three years.  Seif El-Bakly will serve as an Interim CEO, and Matthew Shaw will become Chairman of the Board.    Two executives have left the company in just over a week, as last week, CFO Alex Appleton announced his departure.  The company sold Helios to Galaxy Digital for $65M. "I am pleased to have recently led the successful Galaxy deal," says CEO Peter Wall in his departure notice.  Extreme weather conditions in Texas around Christmas impacted mining operations; the company's 147 BTC mined in December was 25% less than in November.