It’s hard with investments, specifically when they go downward, but there’s always another chance. Don’t get frustrated with things that you can’t control. Be prepared for the next opportunity and move on.
A developer tried to calm me down by saying, "Forget about past losses and start planning for future success. I want to say, do you understand the sweat I shed every day, working hard without knowing the time just for a goal? I'm sure they never understand the meaning of hard work."