Providing temporary use of non-downloadable software for users to view, access, store, monitor, manage, trade, send, receive, transmit, and exchange digital currency, virtual currency, cryptocurrency, digital and blockchain assets, and non-fungible tokens (NFTs); providing online non-downloadable software for management of digital transactions; providing online non-downloadable software for use as a digital currency wallet; providing online non-downloadable computer software for managing and verifying cryptocurrency transactions using blockchain technology