Maybe, not sure if I'm referencing something concrete or just some common argument, heh. Anyways, my point is that the opportunity cost is the same whether you held bitcoin worth a pizza or usd worth a pizza at the time.

The pizza Bitcoin story is not about a mere $1 billion.

The guy that sold his Bitcoin for pizza, did multiple transactions (detailed in that forum thread), not one. Somehow this part is lost to history when the story gets told.

He liquidated tens of thousands of Bitcoins.

The tally is a lot closer to ~$4 billion at $82k per coin.