I received a photo on WhatsApp yesterday that I couldn't get out of my head. A friend traveling through Lebanon holding a stack of banknotes that looked like Monopoly money — more than 50,000 Lebanese pounds. Do you know how much that was? About 3 reais. That made me reflect on something many Brazilians don't even realize: while we complain about the dollar here, there are countries where the currency has simply disappeared from the economic map.

The real closed 2024 as the worst currency in the world among the main ones, with a devaluation of 21.52%. It sounds scary, but it's nothing compared to what you're about to discover now. Some people are living in economies where the most devalued currency relative to the real isn't even the weakest in the world. It's surreal.

In 2025 and 2026, a global scenario marked by persistent inflation, political crises, and instability turned some currencies into true symbols of fragility. But what really causes a currency to plummet like that? It's not an accident. It's always an explosive combination of factors that destroy confidence.

Uncontrolled inflation is the first villain. Here in Brazil, we're nervous about 5% per year. Now imagine countries where prices double every month. That’s hyperinflation — it devours savings, wages, everything. Then comes political instability: coups, wars, governments changing every year. Without legal security, investors flee, and the currency turns into colored paper. Economic sanctions also kill currencies — when the world closes its doors, the country loses access to the global financial system. And there's more: when the Central Bank doesn't have enough dollars to defend the currency, it crashes. Finally, when even citizens prefer to stash dollars under the mattress instead of trusting the local currency, you know the situation is critical.

All of this matters and turns a currency into a truly devalued one relative to the real and almost everything else.

So here are the 10 currencies that are really at the bottom of the barrel in 2026:

Lebanese Pound (LBP) - The absolute champion. Officially, it should be 1,507.5 pounds per dollar, but since 2020, that doesn't exist in the real world. On the parallel market, you need more than 90,000 pounds to buy 1 dollar. Banks limit withdrawals, stores only accept dollars, Uber drivers ask for payment in dollars. The situation is so critical that the population has simply stopped trusting the currency.

Iranian Rial (IRR) - American sanctions turned this into a third-world currency. With 100 reais, you become a millionaire in rials. The government tries to control the exchange rate, but the reality on the streets is different. There are several parallel quotes. Interestingly, young Iranians are migrating to cryptocurrencies because Bitcoin and Ethereum have become more reliable stores of value than the national currency itself. Investing in crypto has become a solution for those wanting to preserve capital.

Vietnamese Dong (VND) - A different case. Vietnam has a growing economy, but the dong has historically remained weak. You withdraw 1 million dongs at the cashier and get an amount worthy of a crime series. Great for tourists, but for Vietnamese, it means expensive imports and limited international purchasing power.

Laotian Kip (LAK) - Laos is in a complicated situation: small economy, dependence on imports, constant inflation. The kip is so weak that at the border with Thailand, merchants prefer to accept Thai baht. It is the most devalued currency relative to the real in the region.

Indonesian Rupiah (IDR) - Indonesia is Southeast Asia's largest economy, but the rupiah has never managed to strengthen. Since 1998, it has been among the weakest in the world. A plus for Brazilian tourists: Bali is very cheap. With 200 reais a day, you can live like a king.

Uzbekistani Sum (UZS) - Uzbekistan has implemented significant economic reforms in recent years, but the sum still reflects decades of a closed economy. The country tries to attract investments, but the currency remains weak.

Guinean Franc (GNF) - A classic case: resource-rich country but with a weak currency. Guinea has gold and bauxite, but political instability and corruption prevent this wealth from translating into a strong currency.

Paraguayan Guarani (PYG) - Our neighbor has a relatively stable economy, but the guarani is traditionally weak. For us Brazilians, this means Ciudad del Este remains a shopping paradise.

Malagasy Ariary (MGA) - Madagascar is one of the poorest nations in the world, and the ariary reflects that. Imports are very expensive, and the population has virtually zero international purchasing power.

Burundian Franc (BIF) - Closes the ranking with a currency so weak that for large purchases, people carry bags of money. Chronic political instability in Burundi directly reflects on the national currency.

What these data show us is that a devalued currency always indicates a weakened economy. For investors, some lessons are clear. First: fragile economies pose huge risks. Cheap currencies may seem like an opportunity, but most of these countries are in deep crises. Second: there are real opportunities in tourism and consumption — destinations with devalued currencies are financially advantageous for those arriving with dollars, euros, or reais.

But the most important lesson is to understand that trust, stability, and good governance are fundamental for any economy. Watching how currencies plummet helps you see firsthand the effects of inflation, corruption, and instability. And that is valuable knowledge for any investor wanting to protect their wealth.

One way to ensure your money appreciates is to invest safely in assets that cross borders and are not subject to local inflation. Want to keep watching how money turns into power or fragility around the world? Stay alert to these factors — they define not only the cheapest currencies but also the strongest and where hidden opportunities are. Better investing is securing your future.