*The first Bull Market reached its peak on June 8, 2011, with a peak price of $29.64. The second Bull Market reached its peak on December 5, 2013, with a peak price of $1,153. The third Bull Market reached its peak on December 16, 2017, with a peak price of $19,497. The fourth Bull Market reached its peak on November 10, 2021, with a peak price of $68,419.

*The price of the second peak is 38.9 times that of the first peak, with a logarithmic price difference of 3.66. The two peaks are 911 days apart, and the price change rate between the first and second peaks (logarithmic price difference / interval days) is 0.00402, denoted as K(1,2);
*The price of the third vertex is 16.91 times that of the second vertex, with a logarithmic price difference of 2.83. The two vertices differ by 1472 days, and the price change rate between the second and third vertices is 0.00192, denoted as K(2,3);
*The fourth peak price is 3.51 times that of the third peak, with a logarithmic price difference of 1.26. The interval between the two peaks is 1425 days, and the price change rate between the third and fourth peaks is 0.00088, denoted as K(3,4).
*It can be further calculated that K(2,3)/K(1,2) =0.4781; K(3,4)/K(2,3)=0.4586.. It can be seen that there is also a relatively stable proportional relationship between the price change rates of adjacent Bull Market vertices, which can be regarded as the second-order rate of change of Bull Market vertex prices.