As the saying goes: the best time to invest was yesterday, the second-best time is today.

You shouldn't try to outsmart the market by buying at the lowest point if you're aiming for investment income. Sure, if you want to become a day-trader then you might be able to do this kind of playing the market after years of study and practice. But if you're in it for the long run, it doesn't matter whether you buy today, yesterday, or a year ago. Just don't wait until tomorrow