I am calling a maximum potential low of $1500. However, I do not see a reason for which the price is dropping this sharply this weekend. If people were scared of August the 1st, dumping a few weeks ago made more sense (not 2 weeks before); not that there is something to be afraid of.
Bubbles don't make sense. They are blown emotionally and they burst emotionally. Markets are not efficient.
It's all psychology.
The biggest bubbles of our time are the dollar, the euro, the yen, the pound... When they pop bitcoin price will be measured in hundreds of thousands.