Everyone has their own reasons on keeping their faith in bitcoin, and also you have also the reason why your very disappointed with bitcoin. Maybe you experienced a big loss and somehow this become your fear and you are just trying to help others by warning them the possibilities of the big falldown of bitcoin. Thanks for the concern, but you see its still their decision whether to hold it till the end. There are only possible outcome of this, to gain a lot or to lose a lot. Let them be and your opinion still matters.