I hope that was a charity auction otherwise that outcome is quite ridiculous and quite sad. $900k could be better spent.
Maybe it could, but it's not your place to decide. The person who purchased this could have bought it for some sentimental value, because they think it's an important piece of computing history which should be preserved - or perhaps both. Are you to be the judge of the validity of those things?
The item has no inherent value to anyone other than the status of aquiring it.
This is a fine example of why the majority of people live in poverty, nothing more.
As I said elsewhere in the replies, if someone spent $900k on crack and whores, I'm sure you'd be right up there judging the purchaser and drawing arbitrary comparisons againt "you could have done X or Y with it" and I bet none of them were "buy an Apple 1 assembly"