Summary Data
The difficulty and price fell out of sync.
Crypto is supposed to drop difficulty
as current rates becomes unprofitable.
But this was rarely the case. Big
companies like Bitmain operated
massive facilities. To drive smaller
miner operations out of business short
term. They kept rates artificially high.

This is why a number of companies
abandoned Proof Or Work in favor of
Proof Of Stake. However that had it's
own set of problems. As the VC money
started flowing in. The idea of hybrid
systems was mostly abandoned. In
short crypto spent more time in hype
and less in development.
The market shifted from ASIC to
GPU in mid 2017. In mid 2018 it
went back to ASIC. Most of the
shift in cost vs difficulty was Jan
to Feb 2018. Prices recovered and
peaked February to June 2018.
Most companies converted back
to ASIC mining by June 2018. In
late November 2018 the market
bottomed out.

I will continue reporting mining data
in 2019. If you mine at this juncture.
Your gains will be negligible at best.
This information was collected from
Coins Monthly High Difficulty Low Month Low Diff High Value Loss Diff Increase
B Cash
Byte
Dash
Decred
Digibyte
Ethereum
Komodo
Lb Credits
Lite
Monero
Mona
Pascal
Sia
Ubiq
Verge
Zcash
$465
$86.18
$225.30
$55.50
$426
$182.90
$102
$211.50
$318.37
$89.10
$121.20
$210.90
$1,024.55
$180.90
$370.20
$156.30
216,549,000
887,409,957
50,281,504
33,702,492
51,006
2,041,095,665
9,988,712
585,961
583,313
49,463,617,183
37,554
90,840
715,698,599
13,679,448
4,320
5,802,662
$65.40
$0
$14.70
$1.20
$82.50
$30.60
$21.60
$4.20
$78.30
$15
$13.80
$3
$19.60
$29.40
$3.48
$9.9
612,929,000
84,124,148,283
89,892,214
12,442,035,704
2,073,000
3,460,692,356
64,949,125
9,392,093
10,070,355
113,804,069,726
308,700
10,933,200
51,884,577,000
34,205,838
222,971
50,825,275
-85.93%
-100%
-93.47%
-97.83%
-80.63%
-83.26%
-78.82%
-98.01%
-75.40%
-83.16%
-88.61%
-98.57%
-98.08%
-83.74%
-99.05%
-93.66%
183.04%
9,379.73%
78.77%
36,817.25%
3,964.22%
69.55%
550.22%
1,502.85%
1,626.40%
130.07%
722.01%
11,935.66%
7149.50%
150.05%
5,061.36%
775.89%