There is no way 2025 rates are 50% higher. Obviously there are specific outliers depending on market, cabin category, ship, etc. but I have found 2025 to be slightly higher than 2024. In your case, I am assuming you are comparing a deeply discounted 2024 cruise vs. retail pricing in 2025. Roll the dice, and you may get the same discount in 2025, but I don't think it's a fair comparison.