Laszlo Hanyecz is famously known for making the first real-world Bitcoin transaction in history. In May 2010, he purchased two pizzas for 10,000 bitcoins, a transaction that would become legendary in cryptocurrency folklore. At the time, the bitcoins were worth approximately $41, but their value would skyrocket dramatically in subsequent years. Today, those same 10,000 bitcoins would be worth millions of dollars, making Hanyecz's pizza purchase one of the most expensive meals in history. His groundbreaking transaction is now commemorated annually as Bitcoin Pizza Day, symbolizing the cryptocurrency's evolution from an obscure digital asset to a global financial phenomenon.