Hundreds of startups face a massive cash crunch if the search for a buyer for Silicon Valley Bank drags into next week. In a tweet, startup accelerator Y Combinator's CEO Garry Tan said SVB's collapse was "an *extinction level event* for startups and will set startups and innovation back by 10 years or more.  "It is a million times better to go that direction, so that is what they will be focused on this weekend," she said