Dealing with capital gains tax crypto gets messy with crypto-to-crypto trades, where swapping one coin for another triggers a taxable event. Every trade’s a gain or loss, and missing one can cost you. Experience shows traders owing $3,000 on $10,000 swaps they didn’t report. You must calculate fair market value at trade time, track cost basis, and log every swap. A $1,000 BTC-to-ETH trade might owe $200 in tax; ignoring it risks a $1,500 penalty. Track the trades, or you’re burned.