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
Nimiq is a browser based blockchain. It was written in Javascript ES6 and because of this, the complete blockchain runs in the browser. The main goal of Nimiq is to solve the payment solution, and to provide a browser based payment solution of sending money. They also have nearly instant transactions as well. Nimiq is a CPU only mineable coin, since it uses the Aragon2D algorithm. Nimiq intends to lower barriers of entry for blockchain technology, and make it accessible for mainstream use. With an operational betanet already live, users can experience how simple it is to mine inside a browser - installation free. Nimiq is making blockchain technology as accessible as the internet, with a vision to truly decentralize the web. Current available cryptocurrencies are complicated and counterintuitive for the average person to use. True internet decentralization is impossible if access to blockchain technology is limited to only the technically oriented people. Until blockchain can be picked up with general recognition and general usage, its true power remains unrealized. Nimiq originally began as an ERC20 (Ethereum) token, known as NET or Nimiq Exchange Token. Nimiq held its ICO throughout June and July of 2017, and raised over 10 million USD. NET trading was enabled shortly after the ICO, and development began on the project’s Github. NET was converted to NIM, the currency that is based on the Nimiq blockchain and network, on March 31st of 2018. Nimiq’s wallet (Nimiq Safe) is built right into the Nimiq website, which means there is no need to download or sync a wallet application. The wallet will lead you through a setup guide, which will help backup and secure your wallet in the case of data loss. As the Nimiq wallet is based in the browser, however, erasing your cache could delete your balance – so keeping a backup is highly recommended.