HOPE: It's human nature to be optimistic. It's human nature to hope. Furthermore, hope is a component of a healthy state of mind.
Hope is the opposite of negativity. Negativity in life can lead to anger, disappointment and depression. After all, if the world is a negative place, what's the point of living in it? To be negative is to be anti-life.
Ironically, it doesn't work that way in the stock market.