He may of meant nicehash since it pays in bitcoin
IMHO the best card for mining is the GTX1070 or the P104-100(Like others said if you can even find them) Simply because your guaranteed 30Mh/s regardless of the manufacture of memory, they can do mutli-algos like Lyra2v2, they consume far less power than RX580s. They're only negative is the high cost, i bought mine around normal price of 400-440 but every card as feb-6-2018 is OOS.
Next would be the RX580's/570 I have some as well and I Love and hate them, cheap cost(250-300) when i bought them, WITH BIOS MOD, can do 27-30 Hashes, and Dual mine like beasts. The negatives are High power consumption, around 130w~ ETH mining and 170-180w Dual mining. Additionally one the positives they had, dual mining, is about to go away because of all the new ASIC miners about to hit the dual-mining coins.
Last would be the 1060 3GB, when they have Samsung they are ETH beasts! 24mh/s at 80-85w! and at their(MSRP) price of 200-220 they were awesome however those days are sadly long gone and we are stuck with Hynix now. They are still awesome for Equihash like Zcash based coins, but on ETH they now barely do 19 with a good OC. P106-100 are all that's left for ETH and those aren't available in North America.