Large drops on Wall Street have made many stocks more affordable, but large investments are likely still risky.That’s according to personal financial consultant Layne Wilkerson, who says the mantra of ‘Buy low, sell high’ still stands.“I would spread it out over a systematic time period, maybe $1,000 a month until it was all invested," he says. "That way you don’t take a risk of putting it all in at a high point and then we see it decline 20% in the next couple weeks.”Wilkerson made his comments on WFPL’s State of Affairs program Wednesday.