This is the year that digital currencies went mainstream. In the span of just three months last spring, China tested its first-ever digital currency in some of its largest cities, hackers breached a major U.S. oil pipeline and successfully demanded a ransom of more than $4 million in Bitcoin, cryptocurrencies surged to a record combined market capitalization of over $2 trillion, and Jerome Powell, the chair of the U.S. Federal Reserve, warned that cryptocurrencies are 'highly volatile' and 'may carry potential risks to .

https://www.foreignaffairs.com/articles/united-states/americas-crypto-currency-conundrum

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