It is not a must to take every trade and it is not a must to trade. Have you experience difficulty in the Financial Market or disappointment that affected your well being.
Just as a skillful soccer player knows when to run with the ball and when just to hold the ball, a skillful trader should know that there is no need to always trade, and the need to know when to trade, and when to just observe the market. knowing that can also help to improve the profit they make by reducing the losses they can make by trading at wrong times.
Another time to avoid trading is during holidays.