Someday I will sell my crypto and the US govt will take half of it from me in taxes. The money spent on electricity and gear is not deductible unless you form a corporate entity of some sort, and itemize them as deductions. But the income is taxable. I hope by 2020 they get it sorted out.
but what can they do? In any case, the government will make decisions in its favor, and this means necessarily taxation of all incomes of citizens.