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<p><strong>Bitcoin</strong><a href="https://en.wikipedia.org/wiki/Bitcoin#cite_note-19">[a]</a> (<strong>₿</strong>) is a <a title="Cryptocurrency" href="https://en.wikipedia.org/wiki/Cryptocurrency">cryptocurrency</a>. It is a decentralized <a title="Digital currency" href="https://en.wikipedia.org/wiki/Digital_currency">digital currency</a> without a <a title="Central bank" href="https://en.wikipedia.org/wiki/Central_bank">central bank</a> or single administrator that can be sent from user to user on the <a title="Bitcoin network" href="https://en.wikipedia.org/wiki/Bitcoin_network">peer-to-peer bitcoin network</a> without the need for intermediaries.<a href="https://en.wikipedia.org/wiki/Bitcoin#cite_note-JSC-12">[8]</a></p><p>Transactions are verified by network <a title="Node (networking)" href="https://en.wikipedia.org/wiki/Node_(networking)">nodes</a> through <a title="Cryptography" href="https://en.wikipedia.org/wiki/Cryptography">cryptography</a> and recorded in a public <a title="Distributed ledger" href="https://en.wikipedia.org/wiki/Distributed_ledger">distributed ledger</a> called a <a href="https://en.wikipedia.org/wiki/Bitcoin#Blockchain">blockchain</a>. Bitcoin was invented in 2008 by an unknown person or group of people using the name <a title="Satoshi Nakamoto" href="https://en.wikipedia.org/wiki/Satoshi_Nakamoto">Satoshi Nakamoto</a><a href="https://en.wikipedia.org/wiki/Bitcoin#cite_note-whoissn-20">[15]</a> and started in 2009<a href="https://en.wikipedia.org/wiki/Bitcoin#cite_note-NY2011-21">[16]</a> when its source code was released as <a title="Open-source software" href="https://en.wikipedia.org/wiki/Open-source_software">open-source software</a>.<a href="https://en.wikipedia.org/wiki/Bitcoin#cite_note-Antonopoulos2014-10">[7]</a>:ch. 1 Bitcoins are created as a reward for a process known as <a href="https://en.wikipedia.org/wiki/Bitcoin#Mining">mining</a>. They can be exchanged for other currencies, products, and services.<a href="https://en.wikipedia.org/wiki/Bitcoin#cite_note-22">[17]</a> Research produced by <a title="University of Cambridge" href="https://en.wikipedia.org/wiki/University_of_Cambridge">University of Cambridge</a> estimates that in 2017, there were 2.9 to 5.8 million unique users using a <a title="Cryptocurrency wallet" href="https://en.wikipedia.org/wiki/Cryptocurrency_wallet">cryptocurrency wallet</a>, most of them using bitcoin.<a href="https://en.wikipedia.org/wiki/Bitcoin#cite_note-CU2017-23">[18]</a></p><p>Bitcoin has been criticized for its use in illegal transactions, its high electricity consumption, price volatility, and thefts from exchanges. Some economists, including several <a title="Nobel Memorial Prize in Economic Sciences" href="https://en.wikipedia.org/wiki/Nobel_Memorial_Prize_in_Economic_Sciences">Nobel laureates</a>, have characterized it as a <a title="Speculative bubble" href="https://en.wikipedia.org/wiki/Speculative_bubble">speculative bubble</a>. Bitcoin has also been used as an investment, although several regulatory agencies have issued investor alerts about bitcoin.<a href="https://en.wikipedia.org/wiki/Bitcoin#cite_note-CFTC_bitcoin-24">[19]</a><a href="https://en.wikipedia.org/wiki/Bitcoin#cite_note-25">[20]</a></p> Please note that the format of this functions output also depends on your locale settings. For example, if you have set your locale to some country that uses commas to separate decimal places, the output of this function also uses commas instead of dots. This might be a problem when you are feeding the rounded float number into a database, which requires you to separate decimal places with dots.Please note that the format of this functions output also depends on your locale settings. For example, if you have set your locale to some country that uses commas to separate decimal places, the output of this function also uses commas instead of dots. This might be a problem when you are feeding the rounded float number into a database, which requires you to separate decimal places with dots.Please note that the format of this functions output also depends on your locale settings. For example, if you have set your locale to some country that uses commas to separate decimal places, the output of this function also uses commas instead of dots. This might be a problem when you are feeding the rounded float number into a database, which requires you to separate decimal places with dots.Please note that the format of this functions output also depends on your locale settings. For example, if you have set your locale to some country that uses commas to separate decimal places, the output of this function also uses commas instead of dots. This might be a problem when you are feeding the rounded float number into a database, which requires you to separate decimal places with dots.Please note that the format of this functions output also depends on your locale settings. For example, if you have set your locale to some country that uses commas to separate decimal places, the output of this function also uses commas instead of dots. This might be a problem when you are feeding the rounded float number into a database, which requires you to separate decimal places with dots.Please note that the format of this functions output also depends on your locale settings. For example, if you have set your locale to some country that uses commas to separate decimal places, the output of this function also uses commas instead of dots. This might be a problem when you are feeding the rounded float number into a database, which requires you to separate decimal places with dots.Please note that the format of this functions output also depends on your locale settings. For example, if you have set your locale to some country that uses commas to separate decimal places, the output of this function also uses commas instead of dots. This might be a problem when you are feeding the rounded float number into a database, which requires you to separate decimal places with dots.Please note that the format of this functions output also depends on your locale settings. For example, if you have set your locale to some country that uses commas to separate decimal places, the output of this function also uses commas instead of dots. This might be a problem when you are feeding the rounded float number into a database, which requires you to separate decimal places with dots.Please note that the format of this functions output also depends on your locale settings. For example, if you have set your locale to some country that uses commas to separate decimal places, the output of this function also uses commas instead of dots. This might be a problem when you are feeding the rounded float number into a database, which requires you to separate decimal places with dots.Please note that the format of this functions output also depends on your locale settings. For example, if you have set your locale to some country that uses commas to separate decimal places, the output of this function also uses commas instead of dots. This might be a problem when you are feeding the rounded float number into a database, which requires you to separate decimal places with dots.Please note that the format of this functions output also depends on your locale settings. For example, if you have set your locale to some country that uses commas to separate decimal places, the output of this function also uses commas instead of dots. This might be a problem when you are feeding the rounded float number into a database, which requires you to separate decimal places with dots.Please note that the format of this functions output also depends on your locale settings. For example, if you have set your locale to some country that uses commas to separate decimal places, the output of this function also uses commas instead of dots. This might be a problem when you are feeding the rounded float number into a database, which requires you to separate decimal places with dots.Please note that the format of this functions output also depends on your locale settings. For example, if you have set your locale to some country that uses commas to separate decimal places, the output of this function also uses commas instead of dots. This might be a problem when you are feeding the rounded float number into a database, which requires you to separate decimal places with dots.Please note that the format of this functions output also depends on your locale settings. For example, if you have set your locale to some country that uses commas to separate decimal places, the output of this function also uses commas instead of dots. This might be a problem when you are feeding the rounded float number into a database, which requires you to separate decimal places with dots.Please note that the format of this functions output also depends on your locale settings. For example, if you have set your locale to some country that uses commas to separate decimal places, the output of this function also uses commas instead of dots. This might be a problem when you are feeding the rounded float number into a database, which requires you to separate decimal places with dots.Please note that the format of this functions output also depends on your locale settings. For example, if you have set your locale to some country that uses commas to separate decimal places, the output of this function also uses commas instead of dots. This might be a problem when you are feeding the rounded float number into a database, which requires you to separate decimal places with dots.Please note that the format of this functions output also depends on your locale settings. For example, if you have set your locale to some country that uses commas to separate decimal places, the output of this function also uses commas instead of dots. This might be a problem when you are feeding the rounded float number into a database, which requires you to separate decimal places with dots.Please note that the format of this functions output also depends on your locale settings. For example, if you have set your locale to some country that uses commas to separate decimal places, the output of this function also uses commas instead of dots. This might be a problem when you are feeding the rounded float number into a database, which requires you to separate decimal places with dots.Please note that the format of this functions output also depends on your locale settings. For example, if you have set your locale to some country that uses commas to separate decimal places, the output of this function also uses commas instead of dots. This might be a problem when you are feeding the rounded float number into a database, which requires you to separate decimal places with dots.Please note that the format of this functions output also depends on your locale settings. For example, if you have set your locale to some country that uses commas to separate decimal places, the output of this function also uses commas instead of dots. This might be a problem when you are feeding the rounded float number into a database, which requires you to separate decimal places with dots.Please note that the format of this functions output also depends on your locale settings. For example, if you have set your locale to some country that uses commas to separate decimal places, the output of this function also uses commas instead of dots. This might be a problem when you are feeding the rounded float number into a database, which requires you to separate decimal places with dots.Please note that the format of this functions output also depends on your locale settings. For example, if you have set your locale to some country that uses commas to separate decimal places, the output of this function also uses commas instead of dots. This might be a problem when you are feeding the rounded float number into a database, which requires you to separate decimal places with dots.Please note that the format of this functions output also depends on your locale settings. For example, if you have set your locale to some country that uses commas to separate decimal places, the output of this function also uses commas instead of dots. This might be a problem when you are feeding the rounded float number into a database, which requires you to separate decimal places with dots.Please note that the format of this functions output also depends on your locale settings. For example, if you have set your locale to some country that uses commas to separate decimal places, the output of this function also uses commas instead of dots. This might be a problem when you are feeding the rounded float number into a database, which requires you to separate decimal places with dots. Please note that the format of this functions output also depends on your locale settings. For example, if you have set your locale to some country that uses commas to separate decimal places, the output of this function also uses commas instead of dots. This might be a problem when you are feeding the rounded float number into a database, which requires you to separate decimal places with dots.Please note that the format of this functions output also depends on your locale settings. For example, if you have set your locale to some country that uses commas to separate decimal places, the output of this function also uses commas instead of dots. This might be a problem when you are feeding the rounded float number into a database, which requires you to separate decimal places with dots.Please note that the format of this functions output also depends on your locale settings. For example, if you have set your locale to some country that uses commas to separate decimal places, the output of this function also uses commas instead of dots. This might be a problem when you are feeding the rounded float number into a database, which requires you to separate decimal places with dots.Please note that the format of this functions output also depends on your locale settings. For example, if you have set your locale to some country that uses commas to separate decimal places, the output of this function also uses commas instead of dots. This might be a problem when you are feeding the rounded float number into a database, which requires you to separate decimal places with dots.Please note that the format of this functions output also depends on your locale settings. For example, if you have set your locale to some country that uses commas to separate decimal places, the output of this function also uses commas instead of dots. This might be a problem when you are feeding the rounded float number into a database, which requires you to separate decimal places with dots.Please note that the format of this functions output also depends on your locale settings. For example, if you have set your locale to some country that uses commas to separate decimal places, the output of this function also uses commas instead of dots. This might be a problem when you are feeding the rounded float number into a database, which requires you to separate decimal places with dots.Please note that the format of this functions output also depends on your locale settings. For example, if you have set your locale to some country that uses commas to separate decimal places, the output of this function also uses commas instead of dots. This might be a problem when you are feeding the rounded float number into a database, which requires you to separate decimal places with dots.Please note that the format of this functions output also depends on your locale settings. For example, if you have set your locale to some country that uses commas to separate decimal places, the output of this function also uses commas instead of dots. This might be a problem when you are feeding the rounded float number into a database, which requires you to separate decimal places with dots.Please note that the format of this functions output also depends on your locale settings. For example, if you have set your locale to some country that uses commas to separate decimal places, the output of this function also uses commas instead of dots. This might be a problem when you are feeding the rounded float number into a database, which requires you to separate decimal places with dots.
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