Pricing can work both ways, we booked a cruise for winter 2023 which about four months prior to sailing reduced by about 20% (due presumably to low numbers), our TA secured us a slightly better reduction than that. While on the Sojourn Trans-Atlantic in November we booked for Greenland in August 2024 even our TA commented on the great fare. Indeed it was, it is now 50% more expensive.
My conclusion, first look at the itinerary, no good booking a bargain to somewhere you don't want to go, then examine the offerings. After booking keep watching the fares, it is always possible to rebook.