I had a long series on $BTC, and you can follow it on twitter - same handle as here.
The break below 10,000 had absolutely no technical relevance ( psychological level), however, a break below the 8700-9100 range will result in a deeper correction off the parabolic failure.
We have S lvls @ 8,600; 7,900; 6,100; and 5,043
Failure below 8,212 (.618 fib) will mark an inflection , and will articulate a short range negative thesis with a lower check back to 5,043.
One of the more concerning technical aspects is the prolonged downward "trickle" (as opposed to a flush on volume) , as this indicates a longer negative exposure and downward draft.
A 33-55% parabolic correction is normal and healthy, and has been widely expected.
If the negative trickle continues, and we see no flush on volume, we will probably see a 7 handle on the short frame, and a deeper check back.
A 33-55% correction targets the 5,000-6,100 range, a deeper 75-80% correction targets the 4k range.
