Providing temporary use of on-line non-downloadable software for financial transactions on a blockchain; providing temporary use of on-line non-downloadable software for financial transactions; providing temporary use of online non-downloadable software, namely, virtual currency, digital currency, and cryptocurrency; providing temporary use of online non-downloadable software for virtual currency, digital currency, and cryptocurrency trading; providing temporary use of online non-downloadable software for virtual currency, digital currency, and cryptocurrency exchange; providing temporary use of online non-downloadable software for managing and verifying virtual currency, digital currency, and cryptocurrency transactions using blockchain technology; providing temporary use of online non-downloadable software for virtual currency, digital currency, and cryptocurrency transactions using blockchain technology; providing temporary use of on-line non-downloadable computer software for use as an electronic wallet, digital wallet, or cryptocurrency wallet; providing temporary use of on-line non-downloadable computer software for managing, verifying, initiating, receiving, and holding financial transactions, virtual currency, digital currency, and cryptocurrency; providing temporary use of on-line non-downloadable computer software for managing, initiating, receiving, and holding virtual currency, digital currency, and cryptocurrency; providing temporary use of on-line non-downloadable computer software for the purchase, sale, trade, payment, clearing, and deposit of virtual currency, digital currency, and cryptocurrency; authentication of data in the field of financial transactions using blockchain technology; software as a service (SaaS) featuring software for financial transactions; software as a service (SaaS) featuring software for financial exchange; software as a service (SaaS) featuring software for virtual currency, digital currency, and cryptocurrency transactions