The volatility IMO is due entirely to the hard fork. A big player (likely miner) sold at 450 because they know what is coming.
The most obvious explanation is Mike's ragequit, which got wide exposure in the media (NYT, Motherboard, TechCrunch, Reuters, ...) It was also
commented in Chinese forums.
I can't think of any other suiltable explanation for the sudden drop.That's because of your astounding ignorance of economics.
If you ever looked up from your Buttcoin forums, and glanced at say Bloomberg TV, you'd notice there has been an ongoing meltdown in world financial markets since New Years Day.
The Big Money that moves the BTC price is selling to cover losses, and/or take advantage of opportunities in other oversold sectors.
Last time i checked btc had a marketcap of 6.5 billion.
Stocks, commodities etc are in triple digit trillions. ( trillions!)