A crypto currency is a digital currency  . That designed to work as a medium of exchange that uses cryptography to secure its transactions, to control the creation of additional units, and to verify the transfer of assets. Cryptocurrencies are classified as a subset of digital currencies and are also classified as a subset of alternative currencies and virtual currencies.

Bitcoin, created in 2009, was the first decentralized cryptocurrency. Since then, numerous cryptocurrencies have been created. These are frequently called altcoins, as a blend of bitcoin alternative. Bitcoin and its derivatives use decentralized control as opposed to centralized electronic money or central banking systems. The decentralized control is related to the use of bitcoin's blockchain transaction database in the role of a distributed ledger.


Bitcoin has not only Cryptocurrencies  or trendsetter, ushering in a wave of cryptocurrencies built on decentralized peer-to-peer network. The currencies inspired by Bitcoin are collectively called altcoins and have tried to present themselves as modified or improved versions of Bitcoin.


The 4 Most Important Cryptocurrencies Other Than Bitcoin.

1- Litecoin : Litecoin, launched in the year 2011, was among the initial cryptocurrencies following
bitcoin and was often referred to as ‘silver to Bitcoin’s gold.’ It was created by Charlie Lee, a MIT graduate and former Google engineer. Litecoin is based on an open source global payment network that is not controlled by any central authority and uses "scrypt" as a proof of work, which can be decoded with the help of CPUs of consumer grade.


2- Ethereum : Ethereum launched in 2015, it is a decentralized software platform that enables Smart Contracts and Distributed Applications  to be built and run
without any downtime, fraud, control or interference from a third party. During 2014, Ethereum had launched a pre-sale for ether which had received an overwhelming response. The applications on Ethereum are run on its platform-specific cryptographic token, ether. Ether is like a vehicle for moving around on the Ethereum platform, and is sought by mostly developers looking to develop and run applications inside Ethereum.

3- Zcash : Zcash, a decentralized and open-source cryptocurrency launched in the latter part of 2016, looks promising. “If Bitcoin is like http for money, Zcash is https," is how Zcash defines itself. Zcash offers privacy and selective transparency of transactions.
Thus, like https, Zcash claims to pr ovide extra security or privacy where all transactions are recorded and published on a blockchain, but details such as the sender, recipient, and amount remain private.


4- Dash :Dash (originally known as Darkcoin) is a more secretive version of Bitcoin. Dash offers more anonymity as it works on a decentralized mastercode network that makes transactions almost untraceably. Launched in January 2014, Dash experienced an increasing fan following in a short span of time. This cryptocurrency was created and developed by Evan Duffield and can be mined using a CPU or GPU. In March 2015, ‘Darkcoin’ was rebranded to Dash, which stands for Digital Cash and operates under the ticker – DASH.