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Cryptocurrency is considered property by the IRS and every move within the tax year is a recordable transaction. Cryptocurrency held for investment has a gain/loss. Cryptocurrency for personal property is only gains, no losses (so for purchases of goods and services, there is only gains, no losses as they are personal).

To reports gains/losses allowed (NOT FOR MINERS, miners  report as self employed on schedule C and the cryptoccy for them is as if they produced and sold inventory, they have expenses of producing, then they have income for the receipt of the cryptoccy at spot rate on production, then they sell that inventory unless they held for investment purposes LT) . Non-miners  go to "Personal", "Investment Income",  "Stocks, Mutual Funds, Bonds, Other", and record each transaction with the date you sold the coins, for how much, when you acquired them, and for what.  Choose Other as the category.  You can't take a loss on personal items (if you used cryptoccy to purchase goods and services) which you report those under Other/personal items/other. Cryptocurrency for investment purposes is recorded as Everything Else. Make sure only personal use cryptocurrency is recorded in the personal Items section.

You can report transactions in summary for the year as investments LT vs ST and Personal LT vs. ST for 4 categories of reporting.     

https://www.irs.gov/pub/irs-pdf/p544.pdf and  https://www.irs.gov/pub/irs-pdf/i8949.pdf  are the IRS rules for property and reporting.  Personal property net losses are not deductible but investment property is....  follow the IRS guidelines for property.

IRS guidance on cryptocurrency as property:

https://www.irs.gov/newsroom/irs-virtual-currency-guidance 

https://www.irs.gov/pub/irs-drop/n-14-21.pdf 

I hope this was helpful?