Mining may continue to be "profitable" but not by the same metric people have been using for the past 12-18 months.
Times have been good for anyone getting into mining for basically the past two years as rising coin prices have more than offset the accompanied increase in hash-rate and thus difficulty. Now, the good times in mining are finally coming to an end and we are going to be looking at digging in for at least 24-36 months to see any reasonable profitability return.
This is especially true for those looking to buy new mining hardware right now. If you have had your rigs for awhile and you already earned your investments back, you can weather the upcoming dry months a lot better than new investors, as your only consideration is if your mining profits is greater than your electrical costs. Those who need to earn an ROI on top of operating expenses will obviously have a tough time of it, especially as computer hardware is still selling at 200-300% above its MSRP.
To see what is coming you can simply pull up a BTC chart from approximately January 2014 to January 2017. It took BTC roughly 3 years to recover from its November 2013 high of over $1200 and I expect the market to play out similar to that time period. BTC, ETH, ZEC, BCASH and the others will thrash around for another 6 months, just as it took time for BTC to bottom out in the fall/winter of 2014. If this pattern repeats we are looking at 2021 before everything recovers to recent ATH levels.
So if you can tough it out for another 3 years, pay utilities (electricity) out of your own pocket and keep mining and holding, you may indeed make some hefty profits. However, if you are barely scraping by, have bills to pay, have high priced electricity, or the worst-case scenario have recent credit card hardware purchases to pay back, I think you may be in for a tough go of it.
I modified a chart to show one possibility in relation to BTC, although I think it can apply to the whole cryptospace in general. In red I labeled possible similarities to the 2014-2017 time period to try and help myself put one possible scenario into perspective. If the market does indeed play out this way, we will have a long wait before mining truly returns.