42 Computer software design, computer programming, and maintenance of computer software; Computer software development, computer programming and maintenance of computer software for managing cryptocurrency; Computer software development in the field of mobile applications; Developing computer software; Providing technology information in the field of cryptocurrency; Providing temporary use of non-downloadable web-based decentralized applications (DApps) for use in electronically trading, storing, sending, receiving, accepting and transmitting digital currency, and managing digital currency payment and exchange transactions; Providing temporary use of non-downloadable web-based decentralized applications (DApps) for processing electronic payments; Providing temporary use of non-downloadable web-based decentralized applications (DApps) for enabling investors to stake their digital assets eligible for returns in a proof of stake network; Providing user authentication services using blockchain-based software technology for cryptocurrency transactions