These things always go in cycles so the answer is yes, eventually. The problem is there's no way of knowing if it'll shoot up in a month, or meander up over a couple of years.
All you can do is figure out if the shares you hold are undervalued and if they are it makes no sense to sell them.
The problem with the current situation is that normal rules don't seem to be applying. Low interest rates usually push equities higher (because required return can be lower and still substantially beat lower risk investments).
Some of the reasons why the markets are low will clear up quickly, War is always an uncertain time, but is often follwed by a boom. Other issues are more difficult, the fact that some very big companies lied about their earnings means that we really can't know for sure how much any company is worth until new accounting practices are shown to be reliable.
Not long ago there were people who said the "New Economy" would cause constant stable growth. They were obviously wrong. Anyone who tells you that we are into an era of constant decline or lack of growth is probably also wrong. there will be a few more booms and busts in our lifetime.
What is interesting is people have a desire to buy shares (or any other investment) when the price is high and climbing, even though the best value is to be had when the investment is out of fashion, and the price is low.
-Rd