As for me, best coin to mine in 2018 are ETH and KRB. First one is relatively predictable and you can plan your mining business in advance. Karbo has very good perspectives in terms of price. So if you mine and hold you may have nice Xs later this year. It's still easy to mine with ordinary hardware.
What cards are you using to mine KRB? whats the hashartes for card, i want to try it. Thanks
For rx 470/480/570/580 its about 850-1000. KRB use cryptonight algorithms.