Electronic storage of cryptocurrency for others; Providing technology information in the field of cryptocurrency; Providing user authentication services using blockchain-based software technology for cryptocurrency transactions; Providing online non-downloadable software and software as a service (SAAS) services featuring software for managing cryptocurrency transactions using blockchain technology; Providing online non-downloadable software and software as a service (SAAS) services featuring software for the storage, exchange, and use of cryptocurrency; Providing online non-downloadable software and software as a service (SAAS) services featuring software for generating cryptographic keys for receiving and spending cryptocurrency; Providing online non-downloadable software and software as a service (SAAS) services featuring software for use as a digital wallet; Providing online non-downloadable software and software as a service (SAAS) services featuring software for enabling electronic payments and transfer of funds; Providing online non-downloadable software and software as a service (SAAS) services featuring software for messaging, chatting, and video chatting