Just before the comment section will be flooded with “tax is fraud” statements or “change your residence” proposals, I would like to point to FairTax proposal, where all income, gains, payroll and other taxes are replaced with consumption tax.

Basically, when you pay crypto at a coffee shop they must use a publicly displayed address (QR code at the counter) for all customer payments. And a set portion of all collected payments will be paid to a tax account.

This is pretty much the only feasible outcome of mass crypto adoption - dramatic simplification of the tax code.

For now you can use paid tools/services that assemble all your transactions for proper accounting of taxes. Have fun!