If you are long term trader , go for Ethereum.
If you are daily trader , go for Dogecoin .
Dogecoin is one of the best coins for trading and even other purpose . Many are of the opinion Ethereum is the No.1 altcoin but for me it is dogecoin.
agree to this but i would like to add ICN for long term trading as the price do still continue to rise since their ICO few months ago, i just made a big mistake exiting too early, i supposed to profit almost 5x of my money there