Bitcoin decline data，2010 to 2018。

From September 14 to October 8, 2010, Bitcoin fell from $0.17 to $0.01. The decrease was 94%.

From Nov. 6 to Nov. 10, 2010, Bitcoin fell from 0.5 to 0.14, a drop of 72%.

From February 10 to April 4, 2011, Bitcoin fell from 1.1 knife to 0.56 knife, a decline of 49%.

From May 13 to May 21, 2011, Bitcoin fell from $8.45 to $5.58, a 34% decline.

From June 8 to November 17, 2011, Bitcoin fell by 94% from 32 to 2.

From April 10 to July 7, 2013, Bitcoin dropped 76% from 266 to 63.

From November 30, 2013 to January 14, 2015, Bitcoin fell from 1166 to 170, a drop of 85%.

From March 10 to March 24, 2017, Bitcoin fell from $1326 to $892, a drop of 33%.

From June 11 to July 16, 2017, Bitcoin fell 39% from $3025 to $1837.

From September 2, 2017 to September 13, 2017, Bitcoin fell 25% from 5014 to 3766.

From December 17 to December 30, 2017, Bitcoin fell from $19850 to $11690, a 41% decline.

From November 14, 2018 to November 23, 2018, Bitcoin fell from $6498 to $4222, a 34% decline.