Yes the big and long bearish season just like in 2018 can be happen again after bull season, and hard to predict when is coming. Just prepare for that situation because the market will never bullish all the times. Just take profit and withdraw in to fiat, and avoid all in crypto in this situation. But bull market also have high probability to start again, withdraw half balance in to fiat and another remaining hold in crypto for a few month, so we will not missing if bull market extend.