Traders have focused on whether the Fed will raise rates for the first time in nearly a decade at its policy meeting next week. Some experts have cited uncertainty about the Fed's move, as well as lingering concerns about China's growth, amid rocky up-and-down trading in recent weeks.
Read MoreNo Fed interest rate hike until 2017: Sri-Kumar
"There's so much uncertainty what's going to happen with the Fed. And if they don't raise rates next week, we're going to continue to have this conversation about uncertainty. This is the new normal. We need to get used to it," said Jonathan Corpina, senior managing partner at Meridian Equity Partners, on "Closing Bell" Thursday.
He contended that uncertainty will linger as long as the Fed waits to hike interest rates.
But a rate increase, which will likely be a quarter of a percent or less, would not truly shake markets, Pursche contended. He added that he has grown optimistic on corporate earnings amid headwinds like a stronger U.S. dollar easing up.
Read MoreInvestors push Fed: Go now, go big