You’re not hallucinating: Unicorns are indeed running wild across Silicon Valley. Once rare, unicorns — startups valued at more than $1 billion — are now shockingly commonplace: As of this writing, venture capital database CB Insights counts 141 companies with a cumulative valuation of $506 billion. They include Uber (valued at $51 billion), Airbnb ($25.5 billion) and Snapchat ($16 billion), as well as Chinese electronics company Xiaomi ($46 billion) and Indian e-commerce marketplace Flipkart ($15 billion).