I once bought a pizza with 10,000 btc. 
hahaha! really? pizza for 10k btc? That is nuts, no one will ever buy for a pizza that is worth 10k btc. What is that pizza man, a pizza that is made up of gold? If that is , then it is possible
Looks like you don't know that story. Here a link for educating yourself.
http://www.coindesk.com/bitcoin-pizza-day-celebrating-pizza-bought-10000-btc/And no, it was not worth what such amount of bitcoins would be worth today...