What is Digital Cash primarily used for?

Digital Cash is primarily used for enabling online transactions in a secure and efficient manner, which aligns with downloading "digital coins" for online purchases. This form of currency allows users to conduct transactions over the internet without the need for physical money. The concept revolves around using digital representations of currency that can be swiftly exchanged for goods and services online, making it convenient and accessible to consumers and merchants alike.

The use of digital cash facilitates various online payment methods, enhancing the digital economy by offering a streamlined experience for purchasing products and services. This digital alternative mimics traditional cash transactions but adds layers of encryption and security, which are essential for online commerce.

The other options suggest functionalities that do not accurately represent the core purpose of digital cash. For instance, transferring physical coins contradicts the very nature of digital cash, which operates in virtual form. Similarly, storing cash in an encrypted format pertains more to data security than to the primary function of facilitating transactions. Managing bank accounts efficiently does involve digital technology but is not specifically about digital cash, which focuses on transaction methods rather than account management.