Crypto gains are taxed as property in the U.S. Selling, trading, or spending crypto triggers capital gains tax. Short-term gains (held under a year) are taxed at 10–37% based on income; long-term gains (over a year) at 0–20%. Income from mining or staking is taxed as ordinary income. Keep detailed transaction records and report on Form 8949 and Schedule D. Use tax software like CoinLedger for accuracy. Research thoroughly.