The global economic news is currently so bad, I'm expecting to look out the window and see empty grocery store shelves and shootings in the street any second. I estimate each round of gunfire will be worth a 1% BTC increase.
To tell you the truth if it was not for the 1100 usd per btc bubble in 2013..when the Chinese folk went nuts and tried to move around 75 years of China under communism wealth out of the country ASAP....and or course mt.gox and some other scandals ...we'd be sitting pretty good now
oct 18th 2013 started my KNC Jupiter 550gh miner. I think it was 1 BTC a day (for a bit anyway) and that date $150 usd per BTC.
2014 say the ave was 250 usd per btc or so (ouch year)

2015 it is now end of the year and it is 350 usd per btc
hell if not for the china bubble and the scandals we'd be kicking ass now imho around 1000 usd per btc..but drama occurs on all 'births' or so I've been told
