Crypto Tax Reporting
The general concept that crypto disposals (selling, trading, sometimes spending) are usually taxable events — the specific rates, forms, and rules vary enormously by country.
In most countries that have addressed the question at all, converting crypto to fiat currency, trading one crypto for another, or sometimes even spending crypto on goods and services counts as a taxable "disposal" event, similar to selling a stock or other investment asset — typically triggering a capital gains calculation based on the difference between your cost basis and the value at disposal.
The specific rates, exemption thresholds, required forms, and even whether crypto-to-crypto trades are taxable at all differ enormously from country to country, and rules in this area continue to change as more governments formalize their approach. This is genuinely one of the areas where you should check your own country's current rules (or talk to a local tax professional) rather than assume any general description applies to your situation — international frameworks like CARF are increasingly making it easier for tax authorities to see your activity across exchanges regardless of where you live.