Tech valuations are in 'crazy town' -investor

With a $70 billion market cap, DoorDash is worth more than Wendy's, Chipotle, Domino's and Dunkin' Brands combined, that just doesn't make sense, said Gerber.

He thinks these high-flying tech stocks are going to come back down to earth when the Federal Reserve starts raising interest rates again and the cost of money is no longer so cheap.