Profits have only gone up for BTC and LTC. For most alt coins which are mineable like ETH not so much.
One reason is that ETH did go up a little but so did the difficulty. And while BTC and LTC is hitting yearly highs, ETH is still below the $300 mark. I think if ETH breaks $500 or so then finally we will see easy profits of $1-$1.50/day/gpu like we did for most of 2018.
However keep in mind that there are many ASICs now and tons of powered off GPUs which will eventually come online when the profitability is high.
If, or when ETH hits 500 USD or more I expect a huge amount of GPUs pointing to ETH, some people will turn on their rigs again
If ETH hits 1000 USD I expect a new run to buy GPUs again
But if ETH really hits $1000 it's the holders that get the most profit not a newcomer miners.
No doubt about difficulty, I remember 2017, I was mining ETH
But for now I just bought the coins (including ETH) and I'm waiting, unfortunately the electricicty rates in my coutry rised a lot
I m moving to another coin right now like raven or grin. My friend sold a lot of his RX series consider about they got lost when they used it to mine ethereum(only to cover the electricity cost).