By Luc Olinga The billionaire recently became the owner of the social network Twitter. There is no love lost between these two men. They are like cat and dog. They like to make fun of each other’s setbacks and missteps. Elon Musk and financier David Einhorn are each other’s favorite enemy. The first is the CEO of electric vehicle manufacturer Tesla (TSLA) – Get Tesla Inc. Report while the second bet on the failure of Tesla by short-selling the stock. Musk, who sees himself as a visionary wanting to change civilization as we know it today, hates short-sellers. Musk does not like investors and f…