On my previous blog, I wrote about "What is BITCOIN". That BitCoin story mentioned the seller of monkeys to the villagers.
I actually imagined the precious things were soo cheap against BitCoin. Like Diamond, Gold, even you can say life. People are crazy for bitcoin more about the price hick.
You just imagine for what purpose you will buy bitcoin, and where you will use this coin. As being a human or general person what you will do with bitcoin.
I will say nothing. Because you do not know the meaning and purpose of the bitcoin. So now coming to point.
Somewhere I have studied, If the price will be low and quality good, demand increases. And if the price will be high and quality whatever, demand will decrease. 
When bitcoin increased to an extent I think till 1500k, now Imagin the person who (A) has sold that currency to another person B, and B is waiting for the price increase and no buyer is available. Then what will happen, after a certain time you (B) will reduce your price till no buyer available. So what you will do? Either reduce more and try to sell at more less price. But you are not getting any buyer.
The same scenario fit back with BitCoin seller and buyer. The creators are in full masti, but the buyers are in pain.
Some country has made it illegal, and why not, its just a virtual currency and virtual currency is for those who live in the virtual world. Like a virtual boy playing pogo game.
Thank You.