Any market? It would have to be a market where I can get a handle on the state of technology and its economics relatively quickly. I couldn't do it for biotech

Any market? It would have to be a market where I can get a handle on the state of technology and its economics relatively quickly. I couldn't do it for biotech, or cleantech, or surgical instruments, for example. I'd also need to be able understand the users and their culture extremely well. I probably couldn't design a great breakfast cereal, or sneakers for teenagers in Japan. I really meant this comparatively. Understanding markets is an order of magnitude harder than understanding products (at least to me), and is probably more important.