To be honest depression is a serious thing,you shouldnt push yourself if the market is failing stop traing for a while you wont be depressed.Do something else go watch some movies,date your partner or friends,and comeback when the market has started to recover.
That's what I do actually. I limit my hours of staying in front of my pc with my portfolio open or checking coinmarketcap for now. Looking at those reds longer will just push you to sell it.