Uber Technologies (NASDAQ: UBER) has a bold new advocate in CNBC’s Jim Cramer, who believes the ridesharing giant could more than double in value.“I think Uber’s going to $200,” Cramer said during his “Mad Money” lightning round on July 23, calling the company a “cash flow juggernaut.” He urged investors to “go buy more here,” emphasizing that Uber’s business model makes it worth holding, even buying at current levels.The timing of his call is notable. When Cramer made those remarks, Uber was trading at $89 ...