Etherium is my favourite, it has a great potential that will make an impact in 2019. I believe that ETH will have greater impact on the market in 2019 than BTC. Also, I am into exploring the market and searching for new coins with the potential. The one that I am looking at right now is BTCN. It has an excellent project and people behind the idea. I love who committed their dev team is, they are constantly improving it. It seems to gain quite a community that is pretty active and supportive. So far, BTCN reached CMC in no time, its capitalisation is growing and it is already present in a couple of exchanges. We will see, I will keep supporting it through 2019.