Grayscale announced the resignation of its chairman and board member. What Happened: In an official SEC filing, Grayscale Bitcoin Trust (OTCMKTS: GBTC) confirmed that chair Barry E. Silbert and board member Mark Murphy will resign, effective Jan. 1, 2024. The company has appointed CFO Mark Shifke, Matthew Kummell, and Edward McGee to the board effective Jan. 1, 2024. Shifke succeeds Silbert as chairman. Now the board consists of Shifke, Kummell, McGee and CEO Michael Sonnenshein, Shifke has served as the CFO of Digital Currency Group earlier and from September 2023 he has served as on the boar…