A herd of unicorns — startups valued at over $1 billion — are gathering in the Bay Area. Uber, Airbnb, Palantir... It's not often in human history that so much wealth has grown so quickly in one place.
There is a boom on. But economists say you can't call it a bubble till... well, until it goes POP. Today on the show: We visit three bubbly barometers that some say signal a coming bust.
* Note: The developers of the Salesforce Tower in San Francisco claim that it will soon be the tallest building west of the Mississippi. Our listeners in Los Angeles point out that the spire of the future Wilshire Grand Center will make it taller.