When Amazon will accept Bitcoin in payments?
After the launching of Libra currency ( Facebook's coin ) I would guess, they are waiting for that event  in order to happen, if Facebook will success then there is a great possiblity that Amazon is going to launch its own coin too, and at that moment, Amazon will put it as a payment method and of course same thing for Bitcoin and maybe other cryptocurrencies like, Ethereum and Bitcoin cash. Let's see what is going to happen.