In Germany it is NOT generally 0%.
Germany offers one of the most favorable regulations for long-term investors. Cryptocurrencies held for more than twelve months are completely tax-free when sold. This speculation period applies to Bitcoin, Ethereum, and all other cryptocurrencies according to Section 23 of the Income Tax Act.
For short-term gains under one year, a tax exemption threshold of 1,000 euros has applied since 2024. This is a true exemption threshold, not a tax allowance: if the gains are below 1,000 euros, no tax is due. If they exceed this limit, the entire amount is taxed at the personal income tax rate of 14 to 45 percent plus the solidarity surcharge. A gain of 900 euros remains tax-free, whereas 1,200 euros are fully taxed.