What would turn me Bearish on Bitcoin?

I had promised to detail a chart on Twitter as to what would cause me to change my Bullish Tune. The only way I turn bearish is on a WEEKLY close under the 1.618 Fib and the weekly 50SMA. The two are almost identical in price, and any meaningful price action under them would trigger a possible impulse lower to the low 20K's. Let it be noted I am firmly Bullish. ;)