Some of the irrational exuberance of the last few years might be on the way out of Silicon Valley. One example is a five-foot-tall chrome panda statue at the file hosting company Dropbox, which was rumored to have cost $100,000. Recently, a note was added to it reading: “When it comes to building a healthy and sustainable business, every dollar counts. And while it’s okay for us to have nice things, it’s important to remember to ask ourselves, ‘Would I spend my own money this way?’” Dropbox isn’t the only tech company in the midst of a fiscal soul searching. Is the tech bubble on the verge of bursting?