bitcoin and ether are dropping because cheaper minier are selling in high rate so may be a fact

1 venezula to mine 1 bitcoin cost is 531 usd

2 trinidad and tabago 1190 usd

3 uzbekistan 1788 usd

4 ukrine 1852 usd

5 mayanmar  1983 usd

6 kuwait  1983 usd

7 belarus  2177 usd 

8 bangladesh  2379 usd

9 kazakhstan 2833 usd

10 ethiopia 2855 usd

you can check lower and highest mining rate at @blockfabric/one-bitcoin-mining-cost-by-country

today ether drop 17 percent at the date 14 august 2018 is playing on 264 usd and at the same date 14 august 2017 it was 298 usd in the year between 14 january 2018 it was at 1397 usd 

and bitcoin at 14 august 2017 was 4066 usd and today its playing on 6032 usd 17 december 2017 it was 19479 usd 

lets calculated in percentage  ether 1397 to 264 almost 5.3 x time lower 
and ether 298 to 264 almost 34 usd in loss

and bitcoin 19479 to 6032 almost 3.25 x time lower 
and year to date is 4066 to 6032 almost 50 percent on high 

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