First, what is Ethereum?
Ethereum, like Bitcoin, is an open source based on the "blockchain" technology. The main purpose of Bitcoin and Ethereum is, however, different.
The former should act as a virtual currency - you should be able to use bitcoins to pay for goods and services. The advantage is that the transactions do not need to be verified by a third party, which is usually the bank. This means lower transaction costs, as well as maintaining a certain form of anonymity (which may serve as a replacement for today's cash).
Ethereum is a decentralized application platform. Developers can use the platform to create their applications and take advantage of its benefits:
-Eliminates downtime since everything is stored "in the cloud"
-No third party to deal with
-High security
-Low costs
-Faster transactions
Now lets get down to why the price will be over 1000$. Here I'm going list some points which I think make it likely, however you never now (disclaimer I belive that the ethereum is in a major bubble which will go from 1000$ to 50$ when it pops and everybody understands the major scam which is happening
-ICOs, the scam of all scams, there are more and more scams coming up and one of them is EOS. EOS is going to and will get 1 billion dollar worth of ethereum, which is a no-brainer going to make a demand of no other.
-Right now all eyes are on ethereal and if it can get a higher market cap, its not a matter of if but now. At the same time bitcoin is going in to a uncertain summer which happily ends good with segwit and more.
-Support from major corperitasion will keep the price up and new companies like probably amazon going the ethereal alliance will create a bigger demand for ehteuereum
I got three points for you that support this