On July 13, 2011, developer Leandro César announced on Bitcointalk "The countdown to the first brazilian Bitcoin exchange!" and linked to mercadobitcoin.com.br. Visitors found no order book and no wallet — just a ticking clock, built in Flash. Forum regular Fireball pointed out the obvious: the site "only has a countdown on it." César was announcing a product he hadn't finished building, written in Python, wagering publicly that Brazil would want a Bitcoin exchange by the time the clock hit zero. The original thread is still live: https://bitcointalk.org/index.php?topic=28575.0
One early reply stands out in hindsight. Roger Ver, already one of Bitcoin's loudest evangelists, wrote back: "Bitcoins are going to change the way the world does business. Nice work!"
The timing looked terrible. A month earlier Bitcoin had touched roughly $31, its first speculative peak, then crashed into single digits while commentators wrote obituaries. But César moved fast: within nine days the countdown had given way to a registration page — a Google Form whose first dropdown option was "Vender Bitcoins" (Sell Bitcoins).
Brazil turned out to be the right bet. The largest economy in South America, ninth largest in the world in 2011, and its currency was barely served by the international exchanges. Mercado Bitcoin took BRL deposits through Banco do Brasil, plus a second rail that dates the era: Liberty Reserve — then just another way to move money online, shut down by the US government in 2013, its founder later convicted in a scheme that laundered $6 billion. Early exchanges built on whatever rails existed.
Of the exchanges born in 2011, almost none survived. Tradehill closed within a year, Bitcoinica was hacked three times and folded, and MtGox collapsed in 2014. Mercado Bitcoin became Latin America's dominant Bitcoin exchange and, 15 years on, it's still trading.
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