The difference between the release price of 980Ti and 1080Ti was $50.2080 Ti was more expensive than 1080 Ti.
1080 Ti was more expensive than 980 Ti.
980 Ti was more expensive than 780 Ti.
We've seen this three generations in a row now.
The only time prices went up stupidly high was with turning. Also 2080Ti is on a huge die, doubt the 3080Ti will be. So no it is not justified expecting prices to keep going up.