found: Work cat: United States. Congress. Senate. Committee on Banking, Housing, and Urban Affairs. Virtual currencies, 2018:p. 4 (cryptocurrencies; so-called virtual currencies)
found: Merriam-Webster dictionary online, May 24, 2018(cryptocurrency; any form of currency that only exists digitally, that usually has no central issuing or regulating authority but instead uses a decentralized system to record transactions and manage the issuance of new units, and that relies on cryptography to prevent counterfeiting and fraudulent transactions)
found: Forbes website, May 25, 2018:search: "what are the two worlds of crypto" (cryptocurrency; growing divide: decentralized coins (such as Bitcoin) vs. centralized coins (such as Ripple); cryptocoins; when you buy a crypto coin, you buy money)
found: Investopedia website, June 12, 2018:search: cryptocurrency definition (cryptocurrency; not issued by any central authority; do not have a central repository; prices are based on supply and demand) search: digital currency definition (crypto currencies; form of digital currency which uses cryptography to secure and verify transactions and to manage and control the creation of new currency units; since they are unregulated, they are also considered to be virtual currencies)
found: Vigna, Paul. The age of cryptocurrency, 2015:p. 5 (built around the principle of a universal, inviolable ledger ... in the case of most cryptocurrencies, this network-based ledger is called a blockchain)
