in my opinion it's a good step taken and chosen by Amazon because maybe Amzon has realized that bitcoin will become very expensive in the future so that Amazon keeps and accepts bitcoin as much as they can by utilizing bitcoin payments they will be able to get bitcoin with a very large amount and it is also their strategy to attract increasingly high demand because there will definitely be lots of people shopping using bitcoin payments.
It is good what is wrong with it? I dont think that there is anything wrong in it besides it is good for the rest of the people to invest their money in bitcoin and also good for holder because they will start using their coins if they want to buy something from amazon. Some other big companies have also started accepting bitcoin and gradually the world will follow them.