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
GREENPOWER has been designed to serve as a global rewards currency. GREENPOWER was developed on world-class blockchain technology (Graphene) and features a highly-efficient operating model. The system confirms transactions in just three seconds and has the capacity to process over 100,000 transactions per second. The currency has a fixed supply of coins that has been distributed during the past two years to over 150,000 accounts in over 180 countries. GREENPOWER is a store-of-value unit at the center of an ecosystem of companies, each of which is working synergistically to enhance the overall value for all participants. GREENPOWER is intended to be the currency used as loyalty rewards by millions of merchants worldwide.