Yes there is some Good altcoin and I'm hodling them and keep buying when i have extra money.
1. ETH --> Thanks to its smart contract feature and a lot of coin/ICO still using its platform so there is still a lot of demand and when there is a lot of demand, you will know what will happened next
2. NEO --> China Ethereum because offer smart contract too and When you hodl them, they give you free gasses
3. Vechain --> Same too offer smart contract feature and when you hodl them, you will get free Vethor
4. ONT ---> Offer a smart contract feature too and when you have some of them in your wallet, you will get ONG
5. TRON --> Cause their CEO always active collaborate with Big company and have a good Idea and their developer active developing their network.