We should not worry about the future. But we must stay informed and act with firm conviction.
Wealth creates the illusion that you are in control. When you lose wealth, you learn that you are not. So, I try to control what I can, but not worry about the things I cannot (which is most things). We do the same thing with health. Most of us take it for granted, but few realize that they are merely one heartbeat away from death. Enjoy life while you can, but realize that we are only given a short slice of it. Make the most of the time you have.