And why not? The mild climate (temperatures average 65 degrees to 70 degrees Farenheit year-round) supports an active lifestyle, so this select, super-rich crowd has no need for summer homes or winter retreats.
Though, of course, they might have them anyway.
(Read more:10 ways to make people who walk in your house scream: "Holy $#! " )
Wine and coffee lovers
Napa and Sonoma counties are just a 45-minute drive from downtown San Francisco and comprise over 1,000 of the world's finest vineyards. No megahome worthy of the name lacks a top-shelf, temperature-controlled wine cellar.
The super-rich of this city also appreciate great java, with coffee shops representing the "third space" where current and future tech entrepreneurs can spend hours developing their ventures.
The headquarters of former tech start-ups—Twitter, Zynga, Yelp—proliferate here, providing ample incentive for those chasing their super-rich dreams.
—By Dolly Lenz, for CNBC.com.
The writer is the founder of Dolly Lenz Real Estate LLC, an ultraluxury real estate sales and marketing firm. With over 25 years of sales, marketing and branding experience, Lenz has become an industry leader, having sold over $8.5 billion worth of properties, a record that has earned her the ultimate Stratosphere Award, of which she is the sole recipient.