After a long time, i am happy to see bitcoin price above 400 again at 2016-2-14 20:45 indexed at 401$ per coin.

well actually, price at this moment is much larger than 400$, price now is 720$ and still rising up so now i and others are very happy because of that because we have been waiting for this price for long time
and i remember when price from 270$ went to 400$ and everyone including me were happy back then because that was huge price compares to what it was ew months ago
The bitcoin price is quite volatile. It was about $550 yesterday. It is $670 now. that is bad for mass adoption.