International Monetary Fund (IMF) chief Christine Lagarde told CNNMoney yesterday, Feb.11, that regulation of cryptocurrencies is “inevitable” and necessary on an international level. When asked during an interview with CNNMoney emerging markets editor John Defterios, about the increasing popularity of crypto markets possibly being caused by a “starvation for high returns in the global markets,” Lagarde replied that the trend showed a “herd mentality” of those looking for high yield products as well as an element of speculation. Lagarde added that this trend was also fueled by “dark activity,” a reference to the potential for cryptocurrencies to be used for …