Yes, in some countries, Bitcoin is subject to capital gains tax. In the United States, for example, the Internal Revenue Service (IRS) treats Bitcoin as property for tax purposes and requires individuals to report gains or losses from their Bitcoin transactions. Gains or losses from buying, selling, or exchanging digital currency are reported on Form 8949 and are subject to capital gains tax. Other countries have different approaches, so it’s important to research the local regulations in your country.