There's always a way. You could convert dollars to bitcoin, then bitcoin to dollars in some roundabout way. I buy bitcoin in cash app, sell on localbitcoin, receive in my girlfriend's MercadoPago, then call a contact to buy at dólar Blue if I feel like saving dollars. I get about 1:121 lately on the peso side after all fees but ymmv. I'm sure there's an easier way, frankly. Hell, maybe I should start a bitcoin cueva.