Users of the social network Reddit discuss the recent jump in complexity in the Bitcoin network. The last major change raised the complexity by 250 billion units, or by 21.4% from a value of 1,196,792,694,099 to 1,452,839,779 146. The last time such a major leap took place in 2015. In order for the reader to better understand the scale of this change, we recall that it took almost 7 years for the complexity to rise from 1 to 250 billion. The reason for such a drastic change could only be the introduction of new large-scale mining equipment in the last two or three weeks, and the consequence was a natural growth of the network hash from 8.56 to 10.4 E / s (ex-session per second).