Why has amazon not added bitcoin as one of their payment options?
Are there any risks associated with buying and selling on amazon with bitcoins?
First thing Amazon is service provider and Bitcoin is digital virtual currency.
Bitcoin is far big than amazon. As Amazon have to consider and implement all necessary thing to accept bitcoins. Even on large scale many of service have adopted bitcoins as a payment provider.
So till amazon adopt it we have to wait. And there will be no risk when amazon officially announce bitcoin as a payment partner.