Was curious if anyone had any observations on "real world" events which affect BTC price.
For example, for real/sovereign/fiat currencies usually a rise in inflation decreases the value of that currency. External shocks, such as natural disasters, change in government, etc. also move currency price up or down.
So has anyone observed any correlation between real world events and BTC price?
As has been noted in other posts, difficulty does not in itself affect price. (Ok, before you flame me... Certainly difficulty may contribute to determining BTC price but it doesn't seem to be a strong enough factor by itself to significantly affect the price.) This is evidenced by the dramatic increase in difficulty in the last round without a corresponding dramatic increase in BTC price.
I noticed that in the days after Greece passed its austerity measures the price of BTC has dropped somewhat. To generalize rather broadly, perhaps the health of marquee real/sovereign/fiat currencies (USD and the Euro) is inversely proportional to the price of BTC.
I'm asking because I'm not satisfied with the explanation that BTC price goes up or down simply depending on when old miners who have been hoarding their stashes suddenly decide to cash in their chips