The reason for fear, uncertain and doubt that some people exhibit for weekend is because such people are not risk taker.
The perception of people when it comes to risk is different. While some peole are risk lover who wish to take risk by investing some will not do the same thing. All they will do it to watch the risk taker.
Risk taker are people that do not consider FUD before taking an investment decision.
I think this is the character every investor need. Definitely there are some uncertainty and reason to doubt some investment but the truth is "to succeed, one just have to be risk lover and taker at the same time"