Actually it is black and white for many and it needs to be...

Actually it is black and white for many and it needs to be otherwise it can be emotional reactions and wrong times and I've been there, very expensive mistakes are made on emotion.
Before buying what is the risk to reward ratio?
What's my exit strategies?
What are my cut it lose and sell at a loss prices?
What's my profiting taking points?
How long am i prepared to give this trade?
How much of my parcel am I prepared to trade?

Sometimes other opportunities come up and change that and that's must a decision.

To stay in and just bag moan and groan I cant imagine is healthy for a person. Better to sell imo and have a beer and move on if its that bad, otherwise hang in and stay hopeful.