Its hard to say because ETH is not that capable yet where it can catch the market cap worth those prices. It will take long time until we can see any prices like that. One thing that will hamper from this happening is the crypto currency based ICO projects! If you look at the legitimacy rate for the current ICO then they are dropping and we all know that these projects are highly dependable upon the ETH. They mostly run on its ETH smart contracts and also accept the payment from the same. If the scams increases then their rate will also decrease and thus there wont be anymore use of the ETH in the future thus making it worthless to invest. Now this is also another possibility thus it can decreases the prices heavily. Might take harder to reach 10K.