Apple Inc. (NASDAQ: AAPL) has updated its policy review guidelines for its App Store when it comes to non-fungible tokens, or NFTs, and cryptocurrencies such as Bitcoin (CRYPTO: BTC), Ethereum (CRYPTO: ETH) and Dogecoin (CRYPTO: ETH). What Happened: The changes to the policy are mostly related to in-app purchases, with Apple restricting the use of cryptocurrencies as an alternative payment mechanism.