There are some industries where many players enter with much fanfare but the majority don't survive for long. Both the airlines and shipping industries fall in this category. So, why do companies enter these sectors? Because imagine a world without airlines and shipping, so the size and need of the services is huge. The problem lies elsewhere. The promoters need to conserve cash when the going is good and that is where they usually fail. But in the last few years, things have changed and probably it is time to look at companies in this space.