me too, we must have believe at the coin we have.
when the price is going down, it like a ball. it will be up again.
but I would still hold my bitcoins until I didn't got any backup plan.
Actually everyone likes earning profits by holding bitcoins but sometimes people need to sell some of them because they need money and they cannot wait a long time for the price to go higher for selling them so they just sell them when they see a reasonable price.
If you are making profits with current price then there is nothing wrong in selling it, as we invest our money only to earn profits, so you should not hesitate in selling your coins.