... the price fall is more than the rise
WRONG.
you need to look at the bigger picture.
right now you are just looking at a short period of time where bitcoin price has came down a little. if you look at a couple of months you can see a rise from ~$880 to $2900 and right now it is sitting between $2200-$2400.
even if it falls more it will still be much much higher than the couple of months ago.
with that said, did you get your answer to why people hold bitcoin
I agree. Bitcoin price drops to a very low value few years ago. But it was able to recover and now its on the way to $3000. As long as people continue to use this cryptocurrency it is possible that it will still rise its price. And people are just waiting for the right time they think they can earn the amount they want through converting bitcoin. They're holding it up to now because they think it is not the right time yet. Still patience is the key to this.