By Rob Lenihan Bitcoin evangelist buys even more of the most popular cryptocurrency. As long Michael Saylor is around, Bitcoin will never walk alone. The billionaire co-founder and CEO of MicroStrategy (MSTR) – Get MicroStrategy Incorporated Report, and four-alarm Bitcoin evangelist has taken the concept of HODL — sometimes known as “hold on for dear life” — to the stratosphere. Bitcoin Under PressureThis is a challenging time for digital currencies. Edward Moya, senior market analyst for the Americas with Oanda, noted that “the news cycle has been pretty awful for crypto markets.” “Bitcoin …