"For similar reasons we're not rushing into stablecoins," he said, referring to digital currencies such as Tether that seek to avoid the volatility typically associated with cryptocurrencies by pegging their value to assets such as the U.S. dollar.
"As with cash transactions, businesses that receive cryptoassets with a fair market value of
more than $10,000 would also be reported on," the Treasury Department said in the report.
"Price volatility stemming from speculative demand remains an important obstacle to the wide acceptance of cryptoassets as a means of payment," it said.
Bitcoin, the biggest and most popular cryptocurrency rose nearly 14% on Thursday to $42,000, after plunging 14% a day earlier to its lowest since late January.
China, which powers nearly 80 percent of the global cryptocurrency trade, relies on a particularly polluting type of coal, lignite, to power some of its mining.
The sharp declines came after China banned financial and payment institutions from providing cryptocurrency services.
Bitcoin dropped to $30,066, the lowest since late January. It was last down 22% at $33,502. The most popular cryptocurrency posted its largest one-day loss since March 2020.
Zaka has been appointed by the provincial government as an expert in an advisory committee overseeing its digital assets including cryptocurrency and cryptomining.
Ether, the second-biggest cryptocurrency by market capitalisation after bitcoin, climbed to $4,372.35, eclipsing its previous record hit on Monday, and was last up 2%. Bitcoin was down a touch at $56,240.
US bank J.P. Morgan on Wednesday said the pace of evolution in the ethereum market has "remained rapid" and that there was still room for growth.
The cryptocurrency had slumped almost a fifth from its all-time high hit earlier this month.
It was last up 9.5% at $53,792.0 after touching its lowest since early March on Sunday. Other major coins ethereum and XRP, which tend to move in tandem with bitcoin, were up around 7.7% and 20.4% respectively.