The legal status of the cryptocurrencies in each country is different and most of them have not been identified or changed. While some countries explicitly allowed their use and trade, others banned or restricted them. According to the Library of Congress, the "total ban" on trade or the use of cryptocurrencies applies to eight countries: Algeria, Bolivia, Egypt, Iraq, Morocco, Nepal, Pakistan, and the United Arab Emirates. An "imminent ban" applies to about 15 countries, including Bahrain, Bangladesh, China, Colombia, the Dominican Republic, Indonesia, Iran, Kuwait, Lesotho, Lithuania, Macau, Oman, Qatar, Saudi Arabia and Taiwan.
In the United States and Canada, state and provincial regulators, in cooperation with the North American Securities Administrators Association, are investigating "bitcoin frauds" and ICOs in 40 jurisdictions.
There are different classifications of different agencies, departments, and courts of governments in bitcoin. The Central Bank of China banned the holding of bitcoins by financial institutions in China in early 2014. In Russia, even though the money is legal, it is illegal to buy goods using any currency other than the Russian Republic. Regulations and prohibitions applicable to bitcoin are also likely to apply to similar cryptocurrency systems.
Cash transactions are a potential instrument of avoiding economic sanctions for example against Russia, Iran, or Venezuela. In April 2018, representatives of the Russian and Iranian economies met to discuss how to circumvent SWIFT's global system through decentralized blockchain technology. Russia has secretly supported Venezuela in the creation of petro (El Petro), a national currency corporation initiated by the Maduro government to gain valuable oil revenues by avoiding US sanctions.
In August 2018, the Bank of Thailand announced its plans to create its own cryptocurrency, the Central Bank Digital Currency (CBDC).
Restrictions on customization
Bitcoin and other cryptocurrencies have been temporarily banned (Facebook: advertisement) on Facebook, Google, Twitter, Bing, Snapchat, LinkedIn and MailChimp. Chinese bitcoin transactions are also banned by Chinese internet platforms such as Baidu, Tencent, and Weibo. The Japanese Line platform and the Yandex Russian platform have similar restrictions.
United States tax status
On March 25, 2014, the American Internal Revenue Service (IRS) legalized bitcoin as a property for tax purposes. This means that bitcoin is subject to capital gains tax (English: capital gains tax). In a newspaper published by researchers from Oxford and Warwick, bitcoin was shown to have some characteristics that are more like the precious metal market than traditional currencies, so they agree with the IRS's decision even based on this for other reasons.
The legal fears of the global economy are non-negotiable
As the popularity of and demand for online money has increased since the introduction of bitcoin in 2009, fears have also been raised that such uncontrolled people can be socially disadvantaged in the human global economy provided by the chips. There are many fears that altcoins can be instruments for anonymous web criminals.
MCash networks show a regulatory deficit that has been criticized as enabling criminals to avoid taxes and clean up money. Formal banking systems are free of the transactions that occur with the use and exchange of altcoins, and thus make it easier for individuals to avoid taxation. Because taxpayer-funded reporting is based on taxable mapping, it is difficult to quantify transactions made using existing cryptocurrencies, a form of exchange that is complex and difficult to track.
The anonymous systems provided by most cash machines can also serve as a simpler way to make money. Rather than purging money through an intricate connection of financial actors and offshore bank accounts, money laundering with altcoins can be achieved through anonymous transactions.
Loss, Theft, and Deception
In February 2014 announced the world's largest bitcoin exchange, Mt. Gox, they go bankrupt. The company says it has lost nearly $ 473 million of bitcoin by its customers, most likely due to theft. This equates to approximately 750,000 bitcoins, or about 7% of all existing bitcoins. The price of bitcoin has dropped from a peak of $ 1,160 in December to a low of $ 400 in February. Two members of the Silk Road Task Force — a federal task force with several agencies conducting U.S. investigations into the Silk Road — seized bitcoins for themselves in the course of the investigation.
Carl Mark Force IV, a DEA agent who tried to impeach Silk Road founder Ross Ulbricht ("Dread Pirate Roberts"), pleaded guilty to money laundering, obstruction of justice, and extortion under the color of official rights , and was sentenced to 6.5 years in federal prison. US Secret Service agent Shaun Bridges pleaded guilty to crimes related to his transfer of $ 800,000 worth of bitcoins to his personal account during the investigation, and also admitted separately to money laundering related to one. further theft of cash; he was sentenced to nearly eight years in federal prison.
Homero Josh Garza, who founded startup-related cryptocurrencies GAW Miners and ZenMiner in 2014, admitted in a plea agreement that the companies became part of a triangle scheme (English: pyramid scheme), and admitted of wire fraud in 2015. The U.S. Arbitration and Exchange Commission separately brought a civil action lawsuit against Garza, who was later ordered to pay a verdict of $ 9.1 million and $ 700,000 in interest. The SEC's complaint alleges that Garza, through his companies, falsely sold "investment contracts representing the stock of profits they claimed would be accumulated" from mining.
On November 21, 2017, Cash Tether announced that they had been hacked, and lost $ 31 million USDT from their main wallet. The company secretly stole the stolen money, which is believed to be confined to the hacker's wallet (making it non-refundable). The tether indicates it is building a new identity for its main wallet in response to the attack to prevent the use of stolen coins. In May 2018, Bitcoin Gold (and two other cryptocurrencies) were hit by a successful 51% attack hash by an unknown actor, in which exchanges lost an estimated $ 18m.
In June 2018, the Korean brand Coinrail was hacked, losing about US $ 37 million in altcoins. It blames the fear surrounding the hack for selling $ 42 billion in the cracking salmon market.  On July 9, 2018 Bancor was robbed of $ 23.5 million worth of cryptocurrencies. The French governing body Autorité des marchés financiers (AMF) lists 15 websites of companies requesting investment in cryptocurrency without authorizing it to do so in France.
Moneylenders have been prominent in their applications such as being a safe haven during the banking crisis and payment methods, which have also led to the use of cash transactions in controversial forums in the form of online blacks. marketplaces, such as Silk Road. The original Silk Road closed in October 2013 and has had two more versions since. In the year following the first closure of Silk Road, the number of known black markets increased from four to twelve, while increasing the list of drugs from 18,000 to 32,000.
Darknet brands provide obstacles to legality. Bitcoin and other forms of cryptocurrency used in the black market are not clearly or legally classified in most parts of the world. In the United States, bitcoins are classified as "virtual assets". Such uncertainty puts pressure on law enforcement agencies around the world to adapt to illegal drug trafficking in dark markets.