Can you name three things that you consider "good" and three things that you consider "bad?" They can be objects, behaviors, attitudes, concepts, people or ideas.
Now close your eyes for a moment and think if the things you considered good are always good and those on your bad list are always bad? I bet that at least two, but likely all three, can be classified as the opposite.
That is the nature of the world we live in: nothing is entirely good or entirely bad. Certain things have more good and others have more bad but most can go either way; depending on when, where and how they are utilized.
Our sages say in Pirkei Avot: "Who is rich? He who is happy with his lot." When a person is truly content and satisfied with what he has, he doesn't envy someone else's home, car or wealth; he is free of jealousy and competition. And therefore, he is truly "rich."
Like the three things on your list, this seemingly healthy attitude can sometimes be unhealthy too.
Spiritual and physical are antithetical in their very essence. A superior quality in the physical is a deficiency in the spiritual. So while in material assets being "happy with our lot" is the ideal to live by, in spiritual matters, however, it is the worst deficiency. When we are satisfied with our level of knowledge - we cease learning; when we are comfortable with our current level of generosity - we cease giving and when we our happy with our current level of Judaism - we cease growing. When we cease growing, we descend and fall.
So let's be happy with our lot in the bank, but please, let's never be content and happy with our Jewish possessions.