The stock is slowly bouncing back from a long drawdown.Energy drinks used to be a sleepy category dominated by two players, Red Bull and Monster Beverage. Not much changed in regard to competition each year. Now, that has changed with the emerging growth of Celsius Holdings (CELH -1.99%) and its sugar-free energy drinks.The brand has disrupted the entire energy drink category, with the two incumbent leaders now trying to defend their positions, PepsiCo investing in Celsius, and other brands successfully ent ...