@pleasecallme:
Financially - When you are capable to survive the risk of investment.
Economically - The best time would be when the market is depressed. You can get assets at a discount then. But a problem will arise when the market picks up.
My best strategy for picking a stock. Look for stocks with great fundamentals and whose prices when charted show a negative inverse exponential growth pattern. Yes,sounds crazy because that implies its tanking.Thats the point.Another strategy I use is tracking the supply demand of a share.It's kind of a flirting game between buyers and sellers.That I use to tell me when its time to enter.Just my 2cents.
Uncertainty is certain.Let go