Is Royal Caribbean the most attractive cruise line operator for investors?Cruise ship operator Royal Caribbean Cruises (RCL 2.50%) has been having a breakout year. The company has more than fully recovered from the pandemic lockdowns, and its stock has recently reached all-time highs. With such large stock price gains in a few years, it's fair to wonder whether there's still time to get in on this bull run.Royal Caribbean's full-year 2023 set the stage for an explosive 2024Last year marked the first year of ...