• As the rich get richer, their yachts get longer — and when it comes to boats, the bigger the better. • Sergey Brin, Jeff Bezos, and Mark Zuckerberg have spent nine figures on megayachts in recent years. • These are the biggest yachts owned by tech billionaires.

If you are a billionaire, you're going to need a bigger boat — or at least want a bigger boat.

Superyachts are an increasingly requisite status symbol for billionaires, providing highly secluded leisure and networking sites. They are — more so than real estate — the single most expensive asset you can own.

"It's a bit of a celebration of your success in life, of wealth," Giovanna Vitelli, the chair of the Azimut Benetti Group, one of the biggest producers of superyachts, told Business Insider.

As a marker of wealth, unoffi

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