(Bloomberg) -- MicroStrategy Inc., the dot-com-era software maker turned leveraged Bitcoin proxy, bought an additional $1.5 billion of the cryptocurrency through the sale of stock. Most Read from BloombergHong Kong's Expat Party Hub Reshaped by Chinese InfluxHow California Sees the World, and ItselfCity Hall Is HiringLondon’s Tube Fares Are Set to Rise by 4.6% Next YearAmerican Institute of Architects CEO ResignsIt was the sixth consecutive Monday that the Tysons Corner, Virginia-based firm anno