The reasons why bitcoin price has dropped. The biggest of them lately, is the massive selloffs involving mt-gox's case, next is the selloffs related to various significant factors recently like: taxation, china and other leading country's crackdown on cryptocurrency, media attacks by some wealthy bitcoin haters. And the third reason, which is normal, is the healthy cycle of ups and downs in the market. Since bitcoin had climbed at nearly 20k it has fallen in half, nevertheless, it's value is said to be on the rise compared to its 1k value few years ago. I could say in conclusion that, bitcoin is not dropping but rising, considering that the currency has not come at age yet, but there are already significant rise to the relevant measurable factors that could push bitcoin's value ahead such as, wider acceptability, healthy regulations, involvement from traditional investors and so much more...