This growth stock is selling off on fears of competition from big technology companies like Tesla and Alphabet. It could be time to be greedy and buy shares.Uber Technologies (UBER 0.86%) has defined the ride-hailing industry. The company is the dominant ride-hailing company in the United States and operates in 70 countries worldwide. But people don't take rides; they take Ubers. The fact that Uber's name has become synonymous with ride-hailing speaks to its brand power. Last December, Uber's success earned ...