CNBC's Jim Cramer recommended investors buy companies that can put up strong revenue and earnings regardless of the economic backdrop, explaining the key qualities of a secular growth stock."You want great secular growth stories that can handle high interest rates or a weak economy, and have the ability to scale, meaning you can see how they might eventually grow into something enormous," Cramer said. "Those are the kinds of stocks you can own for years, or even decades, racking up tremendous gains, as long ...