The core activity of Ondefy is to offer a platform for buying and selling cryptocurrencies, particularly its own token "The People's Coin" (also referred to as PEEP$). The platform allows users to purchase cryptocurrencies using various payment methods such as credit cards, bank transfers, Apple Pay, or Google Pay. Ondefy also provides a secure and user-friendly environment for cryptocurrency trading and makes information available on the security and risks of cryptocurrency trading.