Who would have ever thought that the New York Times would be in financial trouble? This demonstrates that the economy is changing rapidly in ways that aren't being addressed. It's not just that derivatives are hard to understand, it's that the way the entire economy is changing that is hard to understand. I really think the things our economic experts learned just don't apply now, but then, that means nobody knows just what's going on.
If it was me, because of this uncertainty, I'd go back to basics as much as possible; buy sparingly, keep funds handy in case of problems, don't get giddy when things are going well.