Business intelligence firm MicroStrategy’s Bitcoin stash has just crossed over $20 billion in value as Bitcoin rallied above $80,000. MicroStrategy’s 252,200 Bitcoin (BTC) is now worth $20.54 billion — putting the company up over 104% on its Bitcoin investment strategy, according to “Saylor Tracker,” named after the firm’s executive chairman, Michael Saylor. The Bitcoin stacking firm has bought Bitcoin 42 times at a dollar cost average of $39,292, Bitcoin Treasuries data shows. MicroStrategy remains the largest corporate holder of Bitcoin by far, followed by Bitcoin miners Marathon Digital and…