3 scenarios:
1. bitcoin stays in uptrend: bitcoin turns now and so confirms its uptrend, trendline works as support,
2. bitcoin fakes out uptrend and remains bullish short therafter: bitcoin leaves uptrend due to current strong bearish momentum, but continues bullish after some time, e.g. around february,
3. bitcoin leaves uptrend now and goes bearish: bitcoin leaves uptrend, resumes, tests broken trend lines, trend line works as resistance and bitcoin falls, this will establish a new downtrend