166 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. Archived from the original on Retrieved Tasca, Paolo (7 September 2015).
54 After the announcement, the value of bitcoins dropped, 55 and Baidu no longer accepted bitcoins for certain services. Any copying, reproduction and/or redistribution of any of the documents, data, content or materials contained on or within this website, without the express written consent of m, Gold Seek LLC, is strictly prohibited. Retrieved 11 December 2013. Retrieved 2 February 2018. U.S Commodity Futures Trading Commission.
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