Why Uber’s $50 Billion Valuation Could Burst the Tech Bubble

If Uber “got a cold, I think the rest of the ‘unicorns’ would get pneumonia,” venture capitalist Kevin Kinsella says.

Veteran venture capitalist Kevin Kinsella has a message for fast-growing startups: Take the money and run–far away from Uber.

Kinsella, founder of Avalon Ventures and an investor in tech and life sciences companies, has been sounding the alarm recently about the high valuations of tech companies. He’s particularly concerned about the rise of so-called “unicorns,” or private companies valued at more than $1 billion–though he says that as long as investors are showering some startups with cash, entrepreneurs should embrace unicorn status.

“If the bank window is open and they’re giving away money on the cheap, I think entrepreneurs should be backing their trucks up,” the La Jolla, California-based investor said in an interview last week. “From an entrepreneur’s standpoint, it’s a lovely day out there.”

That’s particularly true for Uber, the on-demand car service now reportedly valued at an incredible $50 billion–more than the market capitalization of many huge, public incumbents, including Fedex and salesforce.com.

Kinsella calls himself a fan of Uber’s service (“I use it; all my friends use it; it’s providing a terrific experience”) but worries that any problems with the company or a similarly sized market leader could burst the entire tech bubble.

“If there was a serious hiccough in Uber’s valuation, since they’re the lead unicorn–if they got a cold, I think the rest of the unicorns would get pneumonia,” he says. Uber did not immediately respond to a request for comment.

It’s a familiar worry about the outsize influence that one dominant, successful company can have on its entire industry; if Uber were in banking, it might be deemed “too big to fail.” And Kinsella doesn’t see many obvious ways for the company to avoid eventually sparking a collapse in tech startup valuations, unless Uber can get similar buy-in from public investors in an IPO.

“Maybe one of these unicorns, maybe the leading one–maybe they should go public,” he says. “If Uber or any other unicorn gets the public markets to agree that yeah, they’re worth $50 billion, that could avoid” bursting the tech valuation bubble.

It’s worth noting that a very small percentage of all startups reach unicorn status, though their numbers are growing at an accelerated rate. There are currently 110 unicorns worth a collective $402 billion, including 18 U.S. companies that have reached the $1 billion mark since the start of 2015, according to CB Insights.

That’s far too many according to Kinsella, whose most famous investments include game-maker Zynga and Broadway musical Jersey Boys. He blames his fellow investors for not exercising more restraint when handing out those truckloads of money.

“There’s a serious imbalance between capital available to invest and ideas that are worth investing in,” he says.