The short answer is no. Losses from selling Bitcoin or other cryptocurrencies cannot be offset against gains from shares in Germany. The two belong to different categories of income, and the Income Tax Act keeps their loss buckets strictly apart. There is an exception all the same, and it affects more investors than you might think: losses from crypto derivatives fall under the same provision as share gains and can be offset there. Which of your losses belongs in which bucket, the order in which the tax office does the sums, and what you can still steer before the year is out, is set out in this guide.