By Abhijith Ganapavaram and Shivansh Tiwary(Reuters) -WeWork warned of a possible bankruptcy in a stunning reversal of fortune for the shared workspace provider that four years ago was one of the world's most prized startups with a valuation of $47 billion. "WeWork was perhaps the most overhyped startup of recent years," said Steve Clayton, head of equity funds at Hargreaves Lansdown. WeWork said it was planning to shore up liquidity by cutting rent and tenancy costs, controlling expenses and reducing member churn