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.
I totally agree with you, ethereum is the most undervalued coin to me. It is actually the best coin, better than bitcoin or ripple. Holding ethereum is more meaningful than holding bitcoin.