Câmbio Archives – Aprender sobre Finanças

International Travel: Take Dollars in Cash or Use a Card?

Tips

International Travel: Should You Bring Cash in U.S. Dollars or Use a Credit Card?

By Jeferson Santos January 4th, 2026

Dúvida no câmbio? Compare IOF, segurança e taxas para decidir entre levar dólar em espécie ou usar cartão na sua…

a pile of twenty dollar bills laying on top of each other

What it is

What Is the Dollar?

By Jeferson Santos March 29, 2025

O que é dólar? Você sabia que mais de 60% das reservas internacionais de moeda estrangeira são mantidas em dólar?…

Hello! My name is Jeferson Santos. I have a bachelor’s degree in Information Technology and have been investing in stocks, real estate funds, and fixed-income securities for 6 years. I started with R$100, and by applying analysis and discipline, I managed to grow my net worth by more than 80%—and achieve the financial freedom I’d been seeking for so long. I created “Aprender sobre Finanças” to share what I’ve learned through hands-on experience—no fluff and no unrealistic promises. Here you’ll find real content from someone who actually invests.