New XKCD Forums

Title text: It's a linear extrapolation, Michael. How big could the error be? 10%?

What's the percentage chance the US dollar exists by then?

The US dollar has been around for quite some time and given how much of the world relies on it, it seems unlikely to go away.

I had a moment of panic as I tried to figure out how much a banana costs. Price per kilo I know but the weight of a banana is tough.