General Discussion
In reply to the discussion: Bitcoin hate... I don't understand it... ? [View all]Ms. Toad
(38,680 posts)They don't.
Everyone is obligated to report their taxable income (and income is presumed taxable unless it is expressly excluded). Because not everyone would, absent a very big stick, the IRS has developed third party reporting requirements (your employer reports your income, financial institutions report income and securities transactions and withdrawals over $10,000, expenditures of over $500 by a business are reported on 1099-MISC forms, etc.) But all of those are only ways to incentivize people who would not otherwise report their income to do so.
Third party reporting serves to catch most of the big cheats - but it isn't supposed to be a substitute for direct reporting. Bitcoins are new enough that no third party reporting has yet been developed.