In a previous idea I mentioned that if Bitcoin found heavy resistance at $4200 that would be Fibonacci retracement level 0.236 if the bottom were in at $3475.
Instead resistance was found at $4330 or level 0.382 if the bottom were to be found ultimately at $2950. BTC will find very strong horizontal support at this level most likely. Something else that would support this thesis is if there proves to be support at the $3800 level as well before it ultimately bottoms.
GBTC may Also be a buy near the bottom between $3.20 and $3.60 assuming the bottoming happens during or around market hours.