Bitcoin
Transactions are recorded in “blocks” that are then linked together on a “chain” of previous cryptocurrency transactions. The investors Warren Buffett and George Soros have respectively characterized it as a "mirage" and a "bubble"; while the business executives Jack Ma and J.P. Morgan Chase CEO Jamie Dimon have called it a "bubble" and a "fraud", respectively, although Jamie Dimon later said he regretted dubbing Bitcoin a fraud. BlackRock CEO Laurence D. Fink called bitcoin an "index of money laundering". In January 2018, Japanese exchange Coincheck reported that hackers had stolen $530M worth of cryptocurrencies. Cryptocurrencies are intended for payments, transmitting value across a decentralized network of users. Many altcoins (i.e., those that are not Bitcoin or sometimes Ethereum) are classified in this way and may sometimes be called value tokens. Cryptocurrencies are almost always designed to be free from government manipulat...