I think that a satellite-eye view, not just a bird's-eye view, helps.
Shipping is cyclical.
Psychologically, it is difficult to work up the courage to buy when it's low since the ultimate low can easily be well below one's purchase price. (That's the case with me. I'm fairly sure I saw trades below 40 cents after my purchases, and my average cost is well above that.)
What may be even more difficult is selling when the dividends are flowing, the share price is up, and it looks like blue skies forever. Catching the top is as unlikely as catching the bottom.