Earlier quoted context omitted.
Well, legal barriers aside, Amazon could print their own currency and be in the same position as the Fed. Though to make it absolutely the same position, Amazon's currency should not be tied to the dollar but freely floating. Then there can be no run on Amazon's currency, just like there can be no run on the dollar. However, of course, both Amazon's currency and the dollar can lose in value compared to goods and serv…
"legal barriers aside" is insane, legal barriers aside I'm off to rob a bank. There's only really two or three things that could possibly make banks different: the law, de facto capital requirements to enter the market and hidden knowledge, and you can normally buy hidden knowledge so the thing distinguishing banks from anyone else is either the law or money, and it's mostly the law.
Well, that's not just a legal barrier there, but also that the people on the other side of that transaction don't like to be robbed.
People deal in currency blackmarkets all the time, and all participants are willing. Obviously, being able to do business out in the open is much more efficient and productive. And especially eg Amazon as an above board organisation could not engage in blackmarket operations without endangering their legal activities.