I don't know if $2k is really happening in the future after we reached $4.2k but one thing that I can think that traders will be in panic mode.
yes its posible for the value to go down again to 2k usd if ever whales decides to dump the market and your right , that can cause panicking because 2k usd is not not usual anymore .
And what assurance do we even have that the whales we have all been talking about are really still in the market because looking at the activities of the 2017 when bitcoin was low, the sudden jump in price was as a result of whales first activities on the market and their last activities was the one we experienced sudden dump which crashed the price of the BTC to all time low.
Hence, if they have entered the market again after then, we ought to have seen another sudden pump because this is how the market is being manipulated.