Trading in shares of WeWork has been halted as rumors swirl that the office sharing company, once valued as high as $47 billion, will seek bankruptcy protection. The specter of bankruptcy has hovered over WeWork for some time. Over the summer, the New York company sounded the alarm over its ability to remain in business and later announced plans to renegotiate nearly all of its leases. But cracks had begun to emerge several years ago. WeWork is paying the price for aggressive expansion in its early years. Shares of WeWork, which cost more than $400 two years ago, can now be had for less than $1.