It’s hard to know who tracks the value of cryptocurrencies more closely. Is it the investors who own the virtual coins, or the criminals who hijack computing power to mine them?

For their part, the criminals clearly do follow cryptocurrency values. Symantec, as detailed in its annual Internet Security Threat Report (ISTR), tracked a decline in cryptojacking activity during the course of 2018, a period during which the high values cryptocurrencies reached in late 2017 gradually came down to earth.