I would guess 5k per ETH
something very poor you have designated the future for the etherium. Many experts already today declare that in the near future we will be able to observe the real and very rapid Take-off of the etherium in price. The block chain of the etherium has many possibilities and the etherium will be even more in demand. Thus, the price can soar up to 15,000 dollars.
It is possible the market cap of ETH will be more than 50 trillion dollars.