The price of oil has played an increasingly monolithic role for traders in recent years.  When it was rising, energy-related stocks seemed safe to buy.  When it was falling, they weren't.  Jerry Castellini says that's no longer the case, and he's urging investors to stop watching oil prices -- and start buying stocks.

"Why is it impossible for an oil and gas company to be a growth business?" the president and chief investment officer of CastleArk Management asked CNBC.  "We didn't think that was the case in health care in the 1980s, or in technology in the early '90s, and yet those businesses all became growth businesses."