The $5 Billion Startup Club: The 9 Highest Valued Startups That You Should Definitely Keep An Eye On

There used to be a time when a $1 billion valuation was considered a massive success for tech startups. But in recent years, there's been so many of them that billion-dollar valuations are almost starting to feel routine in tech. So we've raised the bar and narrowed down WSJ's "The Billion-Dollar Startup Club" list to companies that are valued at more than $5 billion.  These startups are transforming our lives and they're definitely worth keeping an eye on moving forward. #9 Pinterest: "A visua...