Bitcoin (BTC) trading volume in the U.S. 2013-2021, per week

Despite a growing Bitcoin price and increasing global interest in cryptocurrencies, U.S. Bitcoin trading in early 2021 was lower than it was during June 2020. This conclusion reveals itself after investigating Bitcoin trading volume against domestic currencies used for the transaction of the virtual currency. In the first weeks of January 2021, less U.S. dollars were spent on buying Bitcoin than in several weeks in 2020. For some this might be surprising, as the United States ranks as the world's leading country in terms of Bitcoin trading in 2020.

It should nevertheless be noted that the source believes the domestic currencies are mainly used by the domestic population: it assumes U.S residents are the only ones who make transactions with U.S. dollars. Whether this assumption is right or not, cannot be verified here (although the international appeal of the U.S. dollar on foreign exchange markets should not be ruled out).