The cruise line operator is benefiting from a new generation of travel enthusiasts.The tranquil seas for Royal Caribbean Cruises (RCL 0.35%) should continue in the new year. The cruise line operator's shares have gained more than 300% over the past five years as it continues to evolve in a post-pandemic travel era. Still, a change in the winds of consumer sentiment could prevent the stock from becoming a multimillionaire maker.NYSE : RCLRoyal Caribbean CruisesToday's Change( -0.35 %) $ -0.99Current Price$ 2 ...