Pulling out my hair while trying to learn to trade better.
Lux and Bitcore seem to be the new goto for better then average, but not always profit. There really aren't any major niches anymore. New miners obliterated those. If you're lucky you'll find a coin that will give you +10-20% for about a day~ before it's on par or worse then something you can find on whattomine. Profits actually aren't THAT bad even though they're declining significantly, we're still well ahead of where we were in parts last year.
We're starting to reach equilibrium, cards are showing up in stock more and more. I saw one yesterday that was in stock for about 12 hours on Newegg. Really, really, really bad card, but it was in stock. eBay 1080tis are closing in more and more on $900, down from $1k. We'll probably see cards semi-regularly in stock next week and prices will return to normal in about 2-3 weeks. It takes a bit after things are back in stock for the prices to come down.
You can always gamble with unlisted coins.
As with a couple times last year when markets dwindle, revenue for 1070s are closing in on 580s. Ethereum is a mining staple coin. It devalues much slower then all the other alts and as such while mining revenue for Nvidia dwindle, dual mining revenue for AMD are relatively the same or decline slowly.
1070 SP Lux = $3.47
580 Dcr+Eth = $3.1