Downloadable cryptographic keys for receiving and spending virtual currencies; virtual reality software; virtual reality game software; graphical user interface software; downloadable software for virtual money; downloadable computer game software; data processing software; computer software for use in relation to digital animation and special effects of images; computer operating software for use in virtual environments; game software for use in virtual environments; augmented reality software for use in mobile devices; computer application software for mobile phones featuring the issuance and transaction of digital certificates for the ownership and use rights of blockchain-based digital content; computer application software for the issuance and transaction of digital certificates for the ownership and use right of blockchain-based digital contents; computer operating software for managing and validating virtual currency and non-fungible token (NFT) transactions using blockchain-based smart contracts; software for the purchase, sale, transaction, payment, settlement, clearance, management and operation of blockchain-based tokens; blockchain-based game software for use in providing multiple user access to a global computer network; two-way wireless communication systems; computer software for recording, transmission, processing and reproduction of sound, images or data; computer e-commerce software; computer operating software for mixed reality