The two coins that I hold the most on my portfolio are BTC and ETH. Ethereum's roadmap is still promising and will most likely follow btc once it skyrockets again. But if you're into gambling like me, you can take a look into Micro Token Offerings. I've tried it once and you will need to participate in the STP system, contribute a certain amount of their token, and you will be a part of their lottery which has the prize that range from $8k to $25 worth of hot featured coins. It's kind of similar to an IEO and could be one of the options you can look into. Another thing is that you can also look at the top 10 coins in cmc and check how their past trends were.