Argentina
Taxable, but whether it falls under Monotributo, the autónomo general regime or crypto cedular rates is genuinely unclear — strongly verify with a local contador.
Taxable income (Impuesto a las Ganancias) on independent activity — exact category is structure-dependent and uncertain.
Progressive Ganancias up to 35%; some crypto-specific cedular rates (5/15%) apply to crypto sale gains, not necessarily to service income.
Autónomo fixed monthly contributions, or Monotributo (single integrated monthly payment — eligibility for foreign-source income doubtful).
Either Monotributo (simplified, revenue caps) or the general regime as autónomo, via ARCA (ex-AFIP). Watch Bienes Personales wealth tax on crypto holdings.
USDC is taxable at ARS value on receipt; holdings may also face the Bienes Personales wealth tax.