Thats a mature approach towards the investment world. Humans are freaky selfish when it comes to earning something for themselves and that is might be a natural extinct of having more and more!
This is good piece of advice and one should just turn off their system if they start getting depressing feelings after a loss.
You mad at your loss -----> Take deep breath -----> Turn off your system -----> Take a day Off -----> Be with your loved one -----> Start with new energy and in different way!