What most people, including me, who are used to throw-away type altcoins and have grown so skeptical and cynical, don't understand...is...ethers are not coins. They are tokens to be used to "rent space" or complete any action on the ethereum blockchain. Ethereum is a programming language which allows developers to build applications on a decentralized internet.
For example, you have a website...your website is hosted on somebody's server. But if you have a website hosted on Ethereum, your website exists on the blockchain. It's decentralized and updated through the mining process.
For those who think Ethereum is a coin, its not. It aims to be the beginning of the next generation of internet, where the entire internet exists on a blockchain, everybody pays a little ether for every action they make online, and the whole net is supported by mining ether the same way the "bitcoin ledger" is supported and updated by mining bitcoin.
There probably will be no immediate or short-term gains. But it might be something you can buy and give to your children and grandchildren.
That's a very bold statement to make that there will probably be no immediate or short term gains. You can't justify that.