Bitfury blockchain analysis platform Crystal released a report on the use of darknet Bitcoin. The report pointed out that in Q1 2020, the number of bitcoins sent and received by darknet entities were 47,000 and 50,000, respectively, a decrease of 22% and 26% compared with the same period in 2017; 2. Bitcoin between different darknet entity maps The number of transfers increased from 5,478 in Q1 2019 to 6,722 in Q2 in 2020, which seems to indicate that the scale of the darknet ecosystem is expanding; 3. The number of bitcoins sent by darknet entities to mixers has increased 9 times from 2019 The number of 790 in Q1 was increased to 7946 in Q1 in 2020. During the same period, the number of bitcoins received by darknet entities from the mixer increased by more than 171%, from 106 to 288.