Line in the sand would be 78.6% retracement of entire rally, so around $330.

If that goes...then could be looking at sub $300. Although I was bearish on BTC, obviously not bearish enough as even I have been burned trying to take long positions.

Guess 'Trend is Your Friend'. And trend at the moment is Bear....but I don't think many people could have imagined a death slide like this.