The cruise line operator is almost a five-bagger over the past two years. This doesn't have to be the end of the ride.It's been another great year for the world's most valuable cruise line operator by market cap and enterprise value, despite being just the second-largest cruise line by revenue and passenger volume. After soaring 89% so far in 2024, shares of Royal Caribbean Cruises (RCL -0.95%) hit another all-time high on Tuesday. The stock could wind up doubling this year if the market proves buoyant over ...