Ethereum is a smart contract platform that enables developers to build tokens and decentralized applications (dapps). ETH is the native currency for the Ethereum platform and also works as the transaction fees to miners on the Ethereum network. Ethereum is the pioneer for blockchain based smart contracts. Smart contract is essentially a computer code that runs exactly as programmed without any possibility of downtime, censorship, fraud or third-party interference. It can facilitate the exchange of money, content, property, shares, or anything of value. When running on the blockchain a smart contract becomes like a self-operating computer program that automatically executes when specific conditions are met. Ethereum allows programmers to run complete-turing smart contracts that is capable of any customizations. Rather than giving a set of limited operations, Ethereum allows developers to have complete control over customization of their smart contract, giving developers the power to build unique and innovative applications. Ethereum being the first blockchain based smart contract platform, they have gained much popularity, resulting in new competitors fighting for market share. The competitors includes: Ethereum Classic which is the oldchain of Ethereum, Qtum, EOS, Neo, Icon, Tron and Cardano. Ethereum wallets are fairly simple to set up with multiple popular choices such as myetherwallet, metamask, and Trezor. Read here for more guide on using ethereum wallet: How to Use an Ethereum Wallet
ICON is a blockchain technology and network framework designed to allow independent blockchains to interact with each other. ICON is supported through a cryptocurrency token, called ICX. ICON is a South Korean-based company that developed a blockchain technology and accompanying cryptocurrency token called ICX. The company bills itself as an interconnected blockchain network, allowing participants in a decentralized system to “converge” at a central point. This is done by connecting a community to other communities through ICON Republic and Citizen Nodes. While blockchains are most commonly associated with cryptocurrencies, enthusiasts point out other areas where the technology can be applied. Any exchange of information can technically be added to a blockchain, though adding some types may not be cost-effective. Transactions involving securities, currencies, business contracts, deeds and loans, intellectual property, and personal identification could be “tokenized. ICON’s blockchain is more like the Plasma or Ontology blockchain in that its purpose is to act as an intermediary between other blockchains and networks. This interconnectability makes the ICON project worth keeping an eye on over the next decade. ICON sports its very own decentralized exchange. This DEX sets currency reserves for each blockchain community so that ICON communities can exchange value in real time through the ICON Republic. In this way, DEX complements C-Rep portals by establishing another gateway for ICON Communities to connect to the ICON Republic.