What is the difference between Cryptocurrency and normal currency ?

Cryptocurrency :
A cryptocurrency (or crypto currency) is a digital asset designed to work as a medium of exchange using cryptography to secure the transactions and to control the creation of additional units of the currency.Cryptocurrencies are classified as a subset of digital currencies and are also classified as a subset of alternative currencies.

Bitcoin became the first decentralized cryptocurrency in 2009.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/centralized banking systems.The decentralized control is related to the use of bitcoin’s blockchain transaction database in the role of a distributed ledger.

Source: Wikipedia

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