It may be naive of me, but really I see no way my company could go under. They have had solid growth for over 40 years, and have double in the last 2. Not only that but our market is growing exponentially and we are the top company in the industry. I feel like the banks would collapse before my company does.
It only takes a few bad eggs to bring down even a large company that is tops in their industry.
See: Enron, WorldCom, etc. etc.
Say some big news does come out (unethical CEO actions, whatever) that causes the company to have to do massive layoffs to shed and reimage the company, while the stock takes a dive.
Completely unrelated to their products and past growth, but a potential scenario, especially in this day and age.
Diversity is important, especially from company stock which you work for, as the two are tied together, and a disaster in that one thing hits you doubly.
You're gonna do what you're gonna do, and it may well work out fine. We're just trying to open your eyes to why it may not be such a good idea.