What is Bitcoin ? Earn Now Bitcoin .

What is Bitcoin ? Earn Now Bitcoin .

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Bitcoin^[a] (₿) 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.^[8]

Transactions are verified by network nodes through cryptography and recorded in a public distributed ledger called a blockchain. Bitcoin was invented in 2008 by an unknown person or group of people using the name Satoshi Nakamoto^[15] and started in 2009^[16] when its source code was released as open-source software.^{[7]:ch. 1} Bitcoins are created as a reward for a process known as mining. They can be exchanged for other currencies, products, and services.^[17] Research produced by University of Cambridge estimates that in 2017, there were 2.9 to 5.8 million unique users using a cryptocurrency wallet, most of them using bitcoin.^[18]

Bitcoin has been criticized for its use in illegal transactions, its high electricity consumption, price volatility, and thefts from exchanges. Some economists, including several Nobel laureates, have characterized it as a speculative bubble. Bitcoin has also been used as an investment, although several regulatory agencies have issued investor alerts about bitcoin..

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