Investors are used to share price fluctuations so don't read into it too much.
SealinkBF, I don't believe they have reached their limit of bargain hunting passengers in Europe.
Remember their count of 81.5 million passengers is not 81.5 million different people. If you make a round trip you are counted as 2 passengers.
Those that want a little extra TLC will purchase the likes of lounge access, preferred boarding, reserved seating etc etc and they will still find them an attractive proposition.