The winner will be no other than Bitcoin. I am still hoping for Ethereum to catch up with BTC and also to take over the no. 1 spot but I think that it won't happen this year. Many people are still using bitcoin as the most trusted and reliable coin, maybe because that's the only coin where you can change it instantly to fiat. In my country, we can instantly change ETH also that's why I want ETH to overtake bitcoin but based on the data https//coinmarketcap.com it won't happen this year.