Like stock, crypto currency gain/loss is reported only when sold. It is important to keep records of the acquisition date and cost so when you do sell, you will be able to report the gain/loss. If you buy and sell crypto the calculations can be overwhelming. Coinbase does not issue form 1099-B. There are third-party software companies that will calculate your gain/loss for you and even prepare Schedule D data that can be imported into TurboTax.
