If EOS delivers (emphasis on the if, EOS is taking a more traditional development and early access approach to blockchain implementation), Ethereum may lose it’s status and those holding long term might lose some of their investment. But, even then, Ethereum is being used as a virtual mining system for EOS, so Ethereum isn’t necessarily useless if EOS follows through, just a prototype for better things to come. UBIQ is a clone of Ether that does everything better than Ether, but it is still based on the same, slow virtual machine.
While not all value comes from the utility of a blockchain, if you are investing long term, don’t just buy Ether and forget about it. You can do that with Bitcoin because it is a sleeping giant, but for blockchains that are designed to run applications (or in the case of EOS, simulation a global “epic” operating system), you need to watch for newer blockchain technologies that can and probably will disrupt older ones.
If you remember back in the day when the Personal Computer because a thing, the meme at the time was that you could buy a computer, and 6 hours later it was obsolete, as the space on the shelf that held the computer you bought was filled by something better. The same logic should apply with blockchains being used as a virtual environment for Decentralized Apps.
While Ethereum isn’t going to be obsolete overnight, mainly because it is being used to smart contract new ICOs left, right and center, it may end up in the proverbial recycle bin of blockchain if it doesn't evolve, so don’t long Ethereum without keeping an eye on what is up and coming if you can't afford to lose your investment. Ethereum could be worth 1200 dollars by the end of the year, or worth 50 dollars by the end of next year. It’s literally a guessing game, no matter how confident “experts” of crypto sound.
This is written by Frederick Briggs.