Your boss is lying to you
This often ties into the previous point about being able to discuss the health of your company with your superiors. Yes, there are often certain pieces of information that your boss might not be able to disclose to you. But if you realize that you're being lied to when you ask certain questions, you need to consider getting the hell out of there.
Some managers will tell you everything is fine when it's not. Others will tell you everything is going down the crapper when it's not. The manager is often in a tough position because keeping both superiors and reports happy is tricky. But if you suspect that your manager is either trying to get you to stay at a job that you shouldn't stay at, or trying to get you to work harder for less money for fear of losing your job, consider looking for another gig. Those are sleazy moves.