Personally, for the moment, the most promising coin is Ethereum, since I believe that you can invest and make good profit. And now when the price is not too high, you should not miss this chance and buy. And also recently I have become interested in Litecoin coin since I noticed a very good tendency that Litecoin can bring a good income in the near future.
I also like investing in ETH but recently there hasn't been much news so it will be difficult to predict the future situation of this coin. In fact, ETH is maintaining at a very low price and if you consider investing, buy now because the opportunity will come to you again this year. Of course, all decisions need to be up to you and to consider carefully before investing because crypto is not an easy place to make money.
In addition, the constant volatility is also the main reason I feel very nervous when investing so it will be difficult to predict what will happen next.