This is despite nearly 57 percent of the 2000 Americans surveyed by the credit score startup and research firm Qualtrics last month saying they had realized some gains from cryptocurrencies, according to a Credit Karma study.
Roughly the same percentage said they had never reported cryptocurrency gains to the Internal Revenue Service, while nearly half of those polled said they understood how owning cryptocurrencies affected their taxes, the study said.
The IRS considers cryptocurrencies such as bitcoin as property for federal tax purposes, meaning any profits or losses from the sale or exchange of the virtual coins should generally be reported as capital gains or losses.
Trading of cryptocurrencies, digital tokens whose value is not backed by central banks and hard assets, surged in 2017 amid a rally in their price. A single bitcoin is worth more than $8000, compared with $1000 a year ago.