This is one of the reasons why many people in the United States who trade cryptocurrencies prefer not to declare their cryptocurrency assets.
source https://www.google.com/url?rct=j&sa=t&url=https://smartereum.com/46957/cryptocurrency-taxation-turbotax-gets-integrated-on-coinbase-to-help-united-states-cryptocurrency-hodlers-file-taxes-tax-news-today/&ct=ga&cd=CAIyGmM2Nzk3ODA2ZWViNjVjODI6Y29tOmVuOlVT&usg=AFQjCNHOIo2L7frY2rXcP696nbTPz17OQA