Buying and selling cryptocurrencies without the involvement of a third party or intermediary is known as  P2P transfer. While  peer-to-peer (P2P) transfer allows users more control over the process, it's important to remember that without a third party to broker the sale, peer-to-peer transactions come with some hazards. But the benefit is that it allow users to send money each other via their portable devices using a linked bank account or card. They make it simple to split bills with relatives and friends.