Bitcoin (₿) is a cryptocurrency. It is a decentralized digital currency without a central bank or single administrator that can be sent from user to user on the peer-to-peer bitcoin network without the need for intermediaries.
A cryptocurrency is a digital asset designed to work as a medium of exchange that uses strong cryptography to secure financial transactions, control the creation of additional units, and verify the transfer of assets. Cryptocurrencies are a kind of digital currency, virtual currency or alternative currency. Cryptocurrencies use decentralized control as opposed to centralized electronic money and central banking systems. The decentralized control of each cryptocurrency works through distributed ledger technology, typically a blockchain, that serves as a public financial transaction database.
OneCoin is a Ponzi scheme promoted as a cryptocoin with a private blockchain. It is promoted by offshore companies OneCoin Ltd (Dubai) and OneLife Network Ltd (Belize), both founded by Ruja Ignatova. A Chinese prosecutor recovered 1.7 billion yuan while prosecuting 98 people for the scam.
Dogecoin is a cryptocurrency featuring a likeness of the Shiba Inu dog from the "Doge" Internet meme as its logo. Introduced as a "joke currency" on 6 December 2013, Dogecoin quickly developed its own online community and reached a capitalization of US$60 million in January 2014.
Ripple is a real-time gross settlement system, currency exchange and remittance network created by Ripple Labs Inc., a US based technology company. Also called the XRP Ledger, Ripple is built upon a distributed open source internet protocol, consensus ledger and the decentralized native cryptocurrency known as XRP. Released in 2012, Ripple purports to enable "secure, instantly and nearly free global financial transactions of any size with no chargebacks." It supports tokens representing fiat currency, cryptocurrency, commodity or any other unit of value such as frequent flier miles or mobile minutes. At its core, Ripple is based around a shared public ledger, which uses a consensus process that allows for payments, exchanges and remittance in a distributed process.
Bitcoin Cash is a cryptocurrency. In mid-2017, a group of developers wanting to increase bitcoin's block size limit prepared a code change. The change, called a hard fork, took effect on 1 August 2017. As a result, the bitcoin ledger called the blockchain and the cryptocurrency split in two. At the time of the fork anyone owning bitcoin was also in possession of the same number of Bitcoin Cash units.
Tether is a stablecoin cryptocurrency. Tether tokens are issued by Tether Limited, which claims that each token issued is backed by one United States dollar. However, Tether Limited has not substantiated this claim through a promised audit of their currency reserves.
Litecoin is a peer-to-peer cryptocurrency and open source software project released under the MIT/X11 license. Creation and transfer of coins is based on an open source cryptographic protocol and is not managed by any central authority. Litecoin was an early bitcoin spinoff or altcoin, starting in October 2011. In technical details, litecoin is nearly identical to Bitcoin.
EOS.IO is a blockchain protocol powered by the native cryptocurrency EOS. The protocol emulates most of the attributes of a real computer including hardware with the computing resources distributed equally among EOS cryptocurrency holders. EOSIO operates as a smart contract platform and decentralized operating system intended for the deployment of industrial-scale decentralized applications through a decentralized autonomous corporation model. The smart contract platform claims to eliminate transaction fees and also conduct millions of transactions per second.
Ethereum Classic is an open-source, public, blockchain-based distributed computing platform featuring smart contract (scripting) functionality. It provides a decentralized Turing-complete virtual machine, the Ethereum Virtual Machine (EVM), which can execute scripts using an international network of public nodes. Ethereum Classic and Ethereum have a value token called "ether", which can be transferred between participants, stored in a cryptocurrency wallet and is used to compensate participant nodes for computations performed in the Ethereum Platform. The classic ether token is traded on cryptocurrency exchanges under the ticker symbol ETC. Gas, an internal transaction pricing mechanism, is used to prevent spam on the network and allocate resources proportionally to the incentive offered by the request.
Stellar is an open source, decentralized protocol for digital currency to fiat money transfers which allows cross-border transactions between any pair of currencies. The Stellar protocol is supported by a 501(c)3 nonprofit, the Stellar Development Foundation.