Winner? I think that the words you use are not used properly. There is no winner in the cryptocurrency. If there is a winner, there is only bitcoin. Because only the bitcoin rises other coins will rise.
Agreed with you, not only this year 2018 but i'm sure bitcoin will always be the winner on every year. I mean, Ethereum still can't beat bitcoin, not only Ethereum, all altcoins can't beat bitcoin. Bitcoin still dominant. it's like there is no cryptocurrency without bitcoin.