ChainCatcher message, well-known trader HORSE (@TheFlowHorse) posted that if MicroStrategy founder Micheal Saylor sells Bitcoin, it will become one of the most successful trades in history, as his Bitcoin investment has so far gained about $14.9 billion. In addition, HORSE listed some significant short-selling events in history.In response, Micheal Saylor stated: I'm not selling BTC (I'm not selling).