Pizza Day :
On May 22, 2010, Laszlo Hanyecz made the first real-world transaction using Bitcoin by purchasing two pizzas for 10,000 bitcoins. This event is now celebrated as "Bitcoin Pizza Day" and is a reminder of the early days of cryptocurrency when its value was relatively low compared to today's prices. At today's value, those 10,000 bitcoins would be worth millions of dollars, making it one of the most expensive pizzas in history.
