It isn't falling that quick. At least not in Bitcoin terms. If things playout in a text book fashion Bitcoin will find support at around $720 and the new resistance will be $765. It will take a lot of selling pressure to push Bitcoin below the low $700 range support which doesn't mean that it won't happen, just that failing some kind of 'event', I wouldn't place my money on it happening 'all of a sudden' and certainly not tonight.