The first documented purchase of a good with bitcoin was carried out by Laszlo Hanyecz . He bought two Domino's pizzas for 10,000 BTC. These pizzas were purchased
from jercos.
To commemorate the transaction, May 22 has been slated out as Bitcoin Pizza Day. to comemmorate this purchase. Pizza providers all over the world, offer discounts to bitcoin users as a way of commemorating laszlo's purchase.
Now imagine he had kept such a large number of bitcoin till today where bitcoin is over $10 000. It even hit $15 000 on April 2017. That man would have been a billionaire by now.😢😢