Providing on-line non-downloadable software for electronically trading digital currencies, securities, commodities and other financial instruments through exchanges; Providing on-line non-downloadable software for electronically trading, storing, sending, receiving, accepting, and transmitting digital currencies; Providing on-line non-downloadable software for managing digital currency payment and exchange transactions; Providing on-line non-downloadable software for controlling access to and communications with computers and computer networks for the purpose of digital currency trading and exchange; Providing on-line non-downloadable software for blockchain-based digital currency management; Providing on-line non-downloadable software for managing and verifying digital currency transactions on a blockchain; Providing on-line non-downloadable software for accessing, reading, and tracking information in the field of digital currency transactions on a blockchain; Providing on-line non-downloadable software for the collection, editing, analyzing, organizing, modifying, book marking, transmission, storage, and sharing of transaction data on a blockchain.; Software as a service (SAAS) services featuring software for digital currencies, securities, commodities and other financial instruments through exchanges