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Noted Keyensian economist Paul Krugman wrote in his New York Times column criticizing bitcoin, calling it a bubble and a fraud; 193 and professor Nouriel Roubini of New York University called bitcoin the "mother of all bubbles." 194 Central bankers, including former Federal. Archived from the original on 23 December 2016. 46 47 On, the US Drug Enforcement Administration (DEA) listed.02 bitcoins as a seized asset in a United States Department of Justice seizure notice pursuant to.S.C. "The Rise and Fall of Bitcoin".

Retrieved 23 February 2015. Archived from the original on Retrieved Tasca, Paolo (7 September 2015). 31 Merchants that do accept bitcoin payments may use payment service providers to perform the conversions. Archived (PDF) from the original on 22 September 2015.

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Archived from the original on Retrieved Ott Ummelas Milda Seputyte. 69 In the blockchain, bitcoins are registered to bitcoin addresses. "Bitcoin Acceptance Among Retailers Is Low and Getting Lower". Archived from the original on 29 November 2013. Journal of Monetary Economics. 167 A December 2017 advisory warned that virtual currencies are risky because: the exchanges are not regulated or supervised by a government agency the exchanges may lack system safeguards and customer protections large price swings and "flash crashes" market manipulation theft and hacking self-dealing. "Digital Currencies: Principles, Trends, Opportunities, and Risks". 130 222 Nobel-prize winning economist Joseph Stiglitz says that bitcoin's anonymity encourages money laundering and other crimes, "If you open up a hole like bitcoin, then all the nefarious activity will go through that hole, and no government can allow that." He's also said that.