MicroStrategy, the Bitcoin holding leader among U.S. publicly traded companies with a market value of 94,066,386,786, announced yesterday (28th) that the company spent $1.42 billion to buy 15,355 Bitcoins at an average price of $92,737 from April 21 to 27, raising its total Bitcoin holdings to 553,555 BTC, with a total purchase cost reaching $37.9 billion.