Cryptocurrency is also called Digital Currency, Digital money, Electronic currency or Electronic money.
Cryptocurrencies can either be centralized or decentralized.
Centralized currencies is controlled by any bank or central authority.
Decentralized currencies isn’t controlled by any bank or central authority.

1. Bitcoin (BTC)

   
   
   Bitcoin is the first digital currency was created and officially released in 2009 by the group of unknown people under the name of Satoshi Nakamoto.
   Bitcoin has the biggest market cap to date around $98 Billion. Bitcoin has such a big reputation. Bitcoin uses peer to peer technology without any central authority or banks,

2. Ethereum (ETH)

   
   
   Ethereum is a decentralized platform that can execute peer-to-peer smart contracts. Created by Vitalik Buterin and launched in 30 july 2015 after a successful crowdsale with 11.9 million coins "premined". In September 2016 and as a result of an attack to The DAO, Ethereum was split into 2: Ethereum (ETH) and Ethereum Classic (ETC). The market cap to date around $28 Billion

3. Ripple (XRP)

   
   
   Ripple is a real-time gross settlement system (RTGS), currency exchange and remittance network. Released in 2012 and with a current market cap of $7.9 Billion. The Ripple system has been integrated into a few banks and payment networks to reduce costs.

4. Monero (XMR)

   
   
   Monero is private digital currency. Monero is a secure, private, and untraceable cryptocurrency. It is open-source and accessible to all. With Monero, on the other hand, is a cryptocurrency that focuses on privacy using the ring signature technology. $1.3 Billion in market cap, Monero is mostly used by individuals wishing to remain incognito on the web.

5. Litecoin (LTC)

   
   
   Litecoin is a peer-to-peer cryptocurrency. Litecoin was released in october 2011 by former Google Employee Charlie Lee. As an alternative to Bitcoin. Overall, Litecoin is similar (and familiar) – it can be mined, used as currency and transacted for goods and services. It has $ 3Billion in market cap.

6. Dash (DASH)

   
   
   Dash (short for 'Digital Cash'). Dash is uses anonymization technology and speed (of transaction). Dash was originally released as XCoin (XCO) on 18th of January in 2014. On February of 28th, the name was changed to "Darkcoin." On 25 of March in 2015. Darkcoin was rebranded as "Dash". It has $2 Billion in current market cap.

7. Lisk (LSK)

   
   
   Lisk is a crowdfunded cryptocurrency, and a unique one – it brands itself as “the first modular cryptocurrency utilising sidechains“. Unlike other systems on this list (aside from Ethereum), the Lisk system can be used by anyone to make their own decentralized apps (‘dapps’) in the programming language Javascript. Lisk is a Blockchain application platform, established in early 2016. It's currently market cap is $584 Million.

8. Dogecoin (DOGE)

   
   
   Dogecoin was originally made as a ‘joke currency’ but have since garnered a real following. Modeled after the dog in the ‘doge’ memes, the cryptocurrency (released in December 2013 by programmer Billy Markus) is now frequently used to tip users in forums. Now It has $116 Million market cap.

9. BitConnect (BCC)

   
   
   BitConnect Coin is an open source, peer-to-peer, community driven decentralized cryptocurrency. People can store and invest their wealth in a non-government controlled currency. It is totally secure and safe. And It has $1 Billion market cap.

10. Stratis (STRAT)

    
    
    STRAT is the fuel that powers Stratis backed by Microsoft. A flexible blockchain development platform designed for the needs of business and service providers that want to develop, test and deploy native C# applications based on blockchain technology on the .Net framework. It provides solutions tailored to the companies needs at extremely competitive rates. It has currently $440 Million in market cap.