[10,000 Bitcoins, $800 Million—This Programmer Bought the Most Expensive Pizzas in History] Today is May 22, Bitcoin Pizza Day. In 2010, programmer Laszlo used 10,000 Bitcoins to buy two pizzas, marking the first real-world transaction in Bitcoin's history. At the time, this amount was worth only $41, but today it is valued at nearly $800 million. However, he has never regretted it, because in his view, it was this transaction that made Bitcoin truly become 'money' for the first time.