I don't believe for a minute that every idea is taken. What might be true is that the investor class is sufficiently narrow-minded in what kinds of ideas they

I don't believe for a minute that every idea is taken. What might be true is that the investor class is sufficiently narrow-minded in what kinds of ideas they will back that all of the good ideas within their narrow investable scope are taken. That might be true, especially given the decrease of adventurousness over the last months as the economy has started to fall apart. But if you genuinely believe that every idea for a business that could possibly succeed has already been started, then you simply lack vision.