Michael Saylor's Strategy (MSTR) bought 3,273 Bitcoin for $255 million last week, a 10x decrease from the previous week's $2.5 billion purchase. Shares rose 0.65% premarket. The company now holds 818,334 BTC at an average cost of $75,537. Saylor hinted at the buy on X with "The Beat Goes On." BTC is near $77,800.