Everyone is entitled to their own opinion.
I own a small mining farm that consists over 84 1060 6GB's. 6-7 months ago I use to make an average of 265$+ a day, sometimes even more. I remember at one point I was making over 350$ with each rig netting me 25$ per day. Now considering that the whole market is down I barely make 8$ per rig now.

Do you think that miners will ever see the 15-20$+ mark or is that time period over?

I believe when the market recovers and the alts boom that we have a pretty good shot at seeing old mining profits.