Currently, Amazon does not accept Bitcoin or any other cryptocurrency directly as a form of payment. However, you can use third-party services to indirectly use Bitcoin for purchases on Amazon. Here are a couple of ways to do that:
Gift Card Services: Websites like Bitrefill and Gyft allow you to buy Amazon gift cards using Bitcoin. You can then use those gift cards to shop on Amazon.
Payment Processors: Some payment processors enable merchants to accept Bitcoin. If a third-party service or app has integrated with Amazon, you might be able to use it to pay with Bitcoin, but this is not a standard option provided by Amazon itself.