Astonishing data for 2021 tell the story. U.S. start-ups raised $330 billion, nearly double 2020’s record haul of $167 billion, according to PitchBook, which tracks private financing. More tech start-ups crossed the $1 billion valuation threshold than in the previous five years combined. The median amount of money raised for very young start-ups taking on their first major round of funding grew 30 percent, according to Crunchbase. And the value of start-up exits — a sale or public offering — spiked to $774 billion, nearly tripling the prior year’s returns, according to PitchBook.The big-money headlines have carried into this year. Over a few days this month, three private start-ups hit eye-popping valuations: Miro, a digital whiteboard company, was valued at $17.75 billion; Checkout.com, a payments company, was valued at $40 billion; and OpenSea, a 90-person start-up that lets people buy and sell nonfungible tokens, known as NFTs, was valued at $13.3 billion.Investors announced big hauls, too. Andreessen Horowitz, a venture capital firm, said it had raised $9 billion in new funds. Khosla Ventures and Kleiner Perkins, two other venture firms, each rai …
