Michael Saylor is down about a billion dollars on his bitcoin (BTC) bet and just stepped down as CEO at MicroStrategy (MSTR), the software company he founded in the 1980s. Being in a tight spot is familiar territory for the 57-year-old Saylor. After the dot-com bubble burst in March 2000, Jim Cramer, the CNBC host, pointed to the collapse of MicroStrategy as a catalyst. The stock had tumbled 62% in a single day after MicroStrategy announced accounting mistakes, erasing $6 billion from Saylor’...