On September 6, according to foreign media reports, the transaction price of digital cryptocurrency bitcoin crossed the $50000 mark again on Sunday after huge fluctuations p> < p > < / P > < p > as of 9 a.m. Beijing time on Monday, the transaction price of bitcoin exceeded the $51000 level, up to $51950 p> < p > as the world's largest digital cryptocurrency, the transaction price of bitcoin has increased by 87% compared with us $27734 on January 4. In mid April, the transaction price of bitcoin once reached a high of about $64000, and then fell with other digital currencies. Now it can be said that it has regained some lost ground p> < p > due to the continuous emergence of new news affecting the transaction price of digital cryptocurrency, the price of bitcoin has changed rapidly like a roller coaster this year. In June this year, El Salvador's legislature voted to take bitcoin as the legal tender of the country. Zhao CHANGPENG, founder and CEO of coin an, a global cryptocurrency trading platform, said last week that its U.S. subsidiary may conduct an initial public offering (IPO) in the United States in the next three years. Media reports said that the profit generated by Yuan'an last year was $800 million to $1 billion p> < p > however, since the beginning of this year, many countries around the world have strengthened their supervision on the mining and trading of cryptocurrencies. These messages either pushed up the transaction price of bitcoin, or bitcoin was a blow. For example, due to the fear that cryptocurrency will be used for money laundering and put consumers at risk, the currency security platform is under increasing pressure from global regulators. This may be one of the reasons why Brian Brooks, the company's chief executive, resigned last month after only three months in office p> < p > at the same time on Monday, the highest trading price of ether reached US $3946( Tianmen Mountain) < / P > < p >