I don't know how to determine FIFO for Bitcoin sales. I purchased in 2022 (several times), moved to a cold wallet, and then moved some back to Coinbase last year to sell.

-I bought largely in small amounts of a couple hundred at a time. -I moved it all to a cold wallet in 2023 -I moved some back this year and sold it in two instances to pay for medical bills. -Coinbase is considering the date I moved it back from my cold wallet as the day I received it--thus making it only a short-term holding and not showing the actual amount of money I made. -I don't know how to determine the "cost" or gains.