Maybe it is falling because many user switch to ether because of successful hard fork. Ether manage very well their situation. Its not advisable to sell your coins now because btc price will pump soon. Just wait for ether hard fork effect. And everything back to normal
Soon ether will us Prove of stake confirmation method, and you can stake you ether to confirm translation, and it is like investment because you can take it out of the vault anytime. You earn by confirming translation. Maybe that's why people are trying to get ether.