Bengaluru, June 27 -- Facebook Inc. is hoping that the stars will be aligned favourably when it launches its digital currency, christened Libra, in the first half of the next calendar year. The odds, though, are stacked against the world's largest social networking site, despite it having a massive user base of nearly four billion users globally and over 700 million users in India alone (if one accounts for WhatsApp's users too)....