Bitcoin has cut it's price in half once again, this time in only 4 months. What a "currency". That means, if this had been a main source of purchasing power, your purchasing power would have been cut in half within those 4 months, or you could look at it like the prices of the things you'd have bought would have doubled in cost for you, over that period of time. It's why it's a joke to call this a currency. It's so erratic and unstable.