Group 1 - The stock of MicroStrategy (MSTR) fell by 4.8% in early trading on Monday, reflecting volatility following a rebound in Bitcoin after a significant drop [1][2] - There is an increasing debate in the market regarding whether it has reached a bottom [1][2] - The company announced the purchase of 1,142 Bitcoins at a total cost of $90 million, with an average price of $78,815 per Bitcoin [1][2]