What a man. I would probably never forgive myself for how stupid I am. But those were the early days of Bitcoin when no one actually believed that Bitcoin would reach one TRILLION market value.
This is absurd. He has nothing to regret since he must have mined a lot of bitcoins every day and he probably bought more pizzas afterward, just look at the original thread.
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https://bitcointalk.org/index.php?topic=137.msg1141#msg1141So nobody wants to buy me pizza? Is the bitcoin amount I'm offering too low?
This is an open offer by the way.. I will trade 10,000 BTC for 2 of these pizzas any time as long as I have the funds (I usually have plenty). If anyone is interested please let me know. The exchange is favorable for anyone who does it because the 2 pizzas are only about 25 dollars total, maybe 30 if you give the guy a nice tip. If you get me the upgraded extra large ones or something, I can throw in some more bitcoins, just let me know and we'll work something out.
Well I didn't expect this to be so popular but
I can't really afford to keep doing it since I can't generate thousands of coins a day anymore 
Thanks to everyone who bought me pizza already but I'm kind of holding off on doing any more of these for now.
So there is absolutely nothing to regret (unless the pizzas weren't good, but apparently they were).