Eos is a cryptocurrency or you can say Token based on Ethereum.
The idea behind EOS is to bring together the best features and promises of the various smart contract technologies out there (e.g. security of Bitcoin, computing support of Ethereum) in one simple to use, massively scalable dapplication platform for the everyday user to empower the impending blockchain economy.
The EOS ecosystem comprises two key elements: the EOS.IO and the EOS tokens.
To draw a parallel, EOS.IO is akin to the operating system of a computer – it manages and controls the EOS blockchain network. EOS.IO uses blockchain architecture that is built to enable vertical and horizontal scaling of decentralized applications. The EOS token is the cryptocurrency of the EOS network.
How Is EOS Different?
While there are already a number of blockchain-based networks like Ethereum, which facilitates decentralized applications, EOS focuses on critical pain-points of blockchain and attempts to solve the problem of speed, scalability, and flexibility that often become a bottleneck for such blockchain-based systems. (For more, see An Introduction to Ethereum Classic.)
Conclusion
I will not be selling my Steem and would not recommend doing so. In the possibility that Steem or parts of Steem can be ported to EOS then we can all reap the benefits. EOS need not be an Ethereum killer to be extremely successful, as in it can reach a very high market cap and benefit the Steem, Bitshares, Peerplays and overall Graphene ecosystem. As all of these projects use Graphene and all of these projects are built up from the same base community it will be very easy for network effects in my opinion to boost all associated projects.
Read more: What Is EOS? | Investopedia https://www.investopedia.com/tech/what-is-eos/#ixzz5G1zfD5kl