In 2010, the Bitcoin Faucet site gave away 5 BTC to every user who completed a captcha. 😲
The site's host, Gavin Andresen, distributed a total of 19,700 bitcoins. At current prices, that amounts to $2 billion.
Did you know that a simple captcha back then was worth 5 BTC? Today, those same 5 BTC would be $500,000. 🚀