Electronic storage of cryptocurrency for others; Providing a website featuring technology that enables users to generate printable cryptocurrency wallets; Providing on-line non-downloadable computer software for use as a cryptocurrency wallet; Providing on-line non-downloadable software for generating cryptographic keys for receiving and spending cryptocurrency; Providing technology information in the field of cryptocurrency; Providing temporary use of non-downloadable web-based decentralized applications (DApps) for cryptocurrency; Providing user authentication services using blockchain-based software technology for cryptocurrency transactions; Technological consulting in the field of cryptocurrency