It was 10,000 BTC for 2 pizzas: https://bitcointalk.org/index.php?topic=137.msg1195#msg1195. One bitcoin used to buy you 0.0002 pizzas. Now it buys 1600.0000 pizzas.

It's called hyperdeflation.

Not going to happen. It's a mindshare thing. If there are 10 million people who think I may as well have a bit of my portfolio in bitcoin that gives it value and that's probably not going away in a hurry.

If anything it'll get worse as it goes from 1 million to 10 million to 100 million. Back when 1 bitcoin = 1 pizza there were perhaps 1000 people into it?

I'll happily sell you a pizza for 1 BTC today if you want.