Ethereum is still undervalued in my opinion. It'll be Bitcoin successor in the future, because ethers are more advanced technically. They are faster, have lower transaction fees and support smart contracts. Ethereum is not also a currency, but also a platform for other services. Thus Ethereum will definitely continue to grow as fast as Bitcoin did last year.
Ethereum seems to be moving along nicely. There's a lot of coins that have a large price increase but Ethereum is moving at a faster pace than most.