42 Design and development of software in the field of mobile applications; Platform as a service (PAAS) featuring computer software platforms for use in the field of cryptocurrency exchange, electronic transfer of cryptocurrency, trading in cryptocurrencies, managing cryptocurrency, storing cryptocurrencies; Providing user authentication services using blockchain-based software technology for cryptocurrency transactions; Software as a service (SAAS) services featuring software for use in the field of cryptocurrency exchange, electronic transfer of cryptocurrency, trading in cryptocurrencies, managing cryptocurrency, storing cryptocurrencies