U.S. households likely owe $25 billion in capital gains taxes for their cryptocurrency holdings, Thomas Lee, head of research at Fundstrat Global Advisors, says in a Thursday report.
Last year, bitcoin soared more than 13 times in price and hit an all-time high above $19,000 in mid-December. It remains about 450 percent higher over the last 12 months.
Tax-related selling would add to bitcoin's tough start to the year.

https://www.cnbc.com/2018/04/05/wall-streets-tom-lee-predicts-massive-outflow-from-cryptocurrencies-ahead-of-tax-day.html