I think ethereum is a very good altcoin and you can expect good amount of growth from it as it is one of the most popular crypto available in the market. It features smart contracts, the Ethereum Virtual Machine (EVM) and it uses its currency called ether for peer-to-peer contracts.these features help in making ethereum the most used platform for ICOs.
Ethereum's development team is also very strong and the roadmap of the platform seems to be very promising.
You can expect good amount of growth from it. It's value can increase to around 1500$ in 5 years.