Microstrategy (MSTR) after the close today disclosed the purchase of another 2,574 bitcoins (BTC-USD) at an average price of $19,427 each. That brings total company holdings up to 40,824 coins purchased for an aggregate price of $475M.CEO Michael Saylor tweeted out the news as well.Bitcoin this evening has dipped a bit, trading hands now at about $18.7K.