Relax btc is not tanking it is because people become worried & start to panic about the dramatic decrease in btc price and feel they have to start selling. Don't worry nothing to fear as we have seen this since the begging of btc it will steadily increase. the price of btc as we all know fluxuates just as a stock market. And the btc community needs to find other exchanges other than mtgox as they have a monopoly on the btc people and the only way to stop this is to start and deal with other established btc exchanges..
PS and the so called "Ddos attack on mt gox" is becoming more clear that this is just another way for them to gain a deathgrip over the bitcoin community so start looking for other exchanges we will not let the people at mt gox dick us around anymore!!!