Well this explains a lot. I hope the Mt. Gox trustees will space their selloffs so as not to cripple the crypto market but there are so many variables in crypto that sometimes one can't say what will cause a fall in price.
I totally agree with @taskmaster4450 concerning the dependence of alt-coins on bitcoin in determining price. It is rather infuriating to see the price of steem go down because bitcoin's price did also. I also concur with @nathen007; alt-coins should break away from bitcoin. This is the only way for a truly decentralized world economy to emerge