I recently started Assassin's Creed Brotherhood - and I see I now have the ability to make "investments" in shops, which seems to involve and upfront outlay of cash, and sort of a "dividend" system of randomly getting a return on that investment. Its been a while, but I don't recall this system from AC II.
It seems like there are a million shops, and they all seem to also have a "risk" rating, which I assume is somehow related. I'm a little overwhelmed by all of the choices, and it seems I can only be "invested" in one shop at a time (unless I misunderstood something). So which shop (or kind of shop) is the best bet for investment?