Ethereum is the most promising coin right now which has the potential to rwach the level of bitcoin.
The coin is used not just as an investment asset but also as a token for smart, decentralised applications. Also, the coin's idea of smart and ledger contracts which can hold state and arbitary code is quite revolutionary.This year itself, the coin has the potential to cross the $1500 mark. It is a good coin and you can expect good returns from the coin.