How would you feel if you were the one who gave out 10,000 BTC for 2 boxes of pizza?
I can't really say how I'm going to feel if I was the person but I know that the person who gave out that 10, 000 BTC for 2 boxes of pizza will be regretting by now knowing the current price of Bitcoin but on a second thought, do you really think the person had just 10, 000 Bitcoin?
If he gave out all that he had in his portfolio by now he would be wishing he never bought that pizza.