When is it too good?

Have you ever been in a position where you feel like things are too good to be true? It's a pretty uncomfortable place to be in. We are trained to believe that things can never get too good. Well, maybe we all aren't trained like that but I was. Always be on the lookout for the storm coming. What if the storm isn't coming? What if the place that you've made for yourself is as calm and peaceful as can be? Not realistic, but it sure does sound good.
It difficult to think that I could be in a position where everything is golden. Hard to imagine, which is partly why I'm trying to talk myself through it. Thinking through the possibilities is mind boggling.