I mean in theory there are a lot of people who trade in oil or precious metals who aren't interested in actually acquiring the resource physically. There are plenty of people that are looking to arbitrage that don't necessarily want the raw resource. The same goes for the FX market. You're right in asking if you can even get it though. I don't actually have the answer to your questions.

I'm sure this is just a story, but it's relevant to your comment: https://thedailywtf.com/articles/Special-Delivery

Also note: I don't disagree with you, there's no way I'd be touching a pretrodollar.