Bitcoin Criminal activity:
Criminal activity:
The use of Bitcoin for criminals has attracted the attention of the regulator, lawmaker and enforcement agencies and the media. In this matter, the FBI has created an intelligence assessment, the SEC has issued a warning message about the investment process using virtual currency and the US Senate in November 2013 A hearing was held on the currency Law.
Several news organizations have claimed that the increase in the popularity of Bitcoin has also increased the possibility of purchasing illegal goods. In 2014, researchers from the University of Kentucky found strong evidence that "computer programming encouraged Illegal activities increase attraction of Bitcoin, they are limited in the use of Bitcoin for political and investment purposes Unyamatrara found support.
Black market: 
According to a CmU researcher, in 2012, 4.5% to 9% of London's London-based drug trade operates on a single web drug market. Black marketing sites have complaints of child pornography, mercenary murders and arms bits for sale. Because the sites are anonymous and lacking central control in this market, it becomes difficult to know whether these services are really real or difficult to take bits.
Various authorities have blocked blackboards of some deep web. In 2013, the US law enforcement agency closed the Silk Road - which resulted in a reduced price for bitcoin.In 2015, the founder of the site was sentenced to life imprisonment. But alternate sites were available in a while, because in the first half of 2014 the Australian Broadcasting Corporation reported that the closure of the Silk Road has made little impact on the online drug trade of Australians, but the amount of drug sales has increased. In early 2014, Dutch authorities closed the online market of illegal goods, Utopia and confiscated 900 bits. At the end of 2014, at the end of a joint police campaign, the authorities of Europe and America confiscated many Bitcoins and closed 400 dip web sites, including the illegal goods market, Silk Road 2.0. Several such criminals were sentenced due to such activities of law enforcement agencies. In December 2014, Charlie Sharm was imprisoned for two years for indirect help to send 1 million dollars to the drug trading site Silk Road. In February 2015, Silk Road founder Ross Woolbrich was convicted of drug trading - he was sentenced to life imprisonment.
Some black marketers may betray bittacense from customers. Bitcoin identified a site called Community Ship Marketplace as a fraud. After the site has been accused of stealing Bitcoin, the way to lift Bitcoin is blocked and closed. In a separate incident, in the beginning of 2014, betacquan escrow accounts were hacked due to ownership of various black market patrons.
According to a UK-based charity, the Internet Watch Foundation reports, Bitcoin is used in child pornography business, about 200 websites accept Bitcoin as a payment medium. But Bitcoin is not the only means of online child pornography. In this regard, O'Reouling, chief of the cyber crime unit of Europeol, said, "EuCash and Passhecord ... are also used to pay for such materials." However, the Internet Watch Foundation lists about 30 sites that only accept Bitcoin. Some of these sites have been closed, including the Crowdfunding website of the Deep Web which aims to raise money for new child pornography. Moreover, when transactions are done, the hyperlink of child porn website is also added to Blockchain as a free database.
Money Laundry: 
Bit coins may not be ideal for money laundering, because all transactions are publicly disclosed. Various authorities, such as the European Banking Authority, the FBI and the Finance Action Task Force of G Seven have expressed concern that beta coins may be used for money. In the first part, US Bitcoin Exchange operator Charlie Schumacher was arrested for money laundering. Second Later, he was sentenced to two years in prison for the "help and support of the unpaid money transfer business". On July 25, 2007, BTC-e's so-called owner Alexander Viikake was arrested in Greece for allegedly laundering $ 4 billion in money laundering laws, violating US law laundering laws. In a report released by the UK Treasury and Home Office "Assessment of the UK's Money Laundering and Risk of Terrorist Financing", it is found that money laundering is the lowest risk of using bit coins and the use of money laundering as the most common means of money laundering.
Ponzi project edit:
Between 2011 and 2012, a Ponzi scheme or a fraudulent scheme using bit queues promises to generate up to 7 percent of the bid by 7 percent to 7 percent of the profit. In July 2013, the US Security and Exchange Commission accused the company and its founder of "cheating with investors in the PNG scheme of bit coins". In September 2014, Judge Bitakken Savings and Trust and his owner fined $ 40 million.
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