The term silicon valley has long since transcended geographic boundaries to signify the tech and vc/startup sectors as a whole. Facebook and Amazon and Uber and Theranos and FTX are all a part of it. It's about the culture and the people that participate in that culture, move fast break things etc. That's what's been going through trainwreck after public trainwreck. And even if you wanted to tie it to a geographic region, which frankly is irrelevant - the vcs are based out of here