When the market is low you buy. Not sell. Remember you haven't lost any money until you actually sell your cryptocurrency. Just like you haven't really gained any money until you actually sell it. So the market will be a roller coaster ride.
Your right bro. So to be able to ride the roller coaster likes market behavior we need to be wisely enough and avoid panic in order to get not lost our portfolio. Or to have enough patience when market is falling because not all the times the market will get fallings but there were always great recovery afterwards.