"Bitcoin firms dumped by National Australia Bank as 'too risky. Decentralized cryptocurrency, bitcoin ( ) is a cryptocurrency, a form of electronic cash. Archived from the original on Retrieved Note:this is a short open access version of a Wall Street Journal article Rubin, Gabriel.; Michaels, Dave; Osipovich, Alexander. Weir, Mike (1 December 2014). "Billions in cryptocurrency wealth wiped out after hack". Archived from the original on Retrieved ewlands, Chris. Wallace, Benjamin (23 November 2011).
The bitcoin protocol specifies that the reward for adding a block will be halved every 210,000 blocks (approximately every four years). A b Hileman, Garrick; Rauchs, Michel. This lowers the size of the average transaction in such nodes' view, thereby increasing the block size without incurring the hard fork implied by other proposals for block size increases. Securities and Exchange Commission. Archived from the original on 9 February 2014. Retrieved Lee, Timothy. Archived from the original on Retrieved several experts told The Washington Post that bitcoin probably uses as much as 1 to 4 gigawatts, or billion watts, of electricity, roughly the output of one to three nuclear reactors. Since transactions can have multiple outputs, users can send bitcoins to multiple recipients in one transaction. "Bitcoin your way to a double espresso". Archived from the original on Retrieved "After Silk Road seizure, FBI Bitcoin wallet identified and pranked". Archived from the original on Retrieved 24 February 2015. Archived from the original on Retrieved Roberts, Daniel (15 December 2017).
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