You must understand that markets are very efficient at pricing every single circumstance and event and the unlock of 41k BTC of GBTC is probably the reason this is happening, so I would not be worried about it, if you have some fiat then this could be a good opportunity to buy as I do not think even that is enough to make the price of bitcoin to drop below the 30k resistance level for long and once this panic passes bitcoin will return to the 32k level. a level in which it has been stuck for a long time.