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So I read through all that, but I'm still not sure where I should put in the gains/losses difference from the mining. I put in the mining income (the value of the coin when I first mined it) as General income on my Schedule C, but the gain/loss from the sell is where I'm hung up. Where can I claim it as a sale of investment asset as you say? Also how could it count as a business inventory as you were saying?