The $10,000 level was not quite stable during the past few weeks, still bulls were hoping to hold it for a longer period this time in order to consolidate and set the ground for further attacks of the mid-$10k and $11k levels.
The mid-week session on September 11 brought some stability as bitcoin erased some part of the loses from the previous session and climbed to $10,158.
If we fall below $10,000 I expect another test of $9,400. Given the fact we are already in September, returning to trading season I don't expect it to fall further down. The pessimistic scenario sees BTC at $9,100.