I disagree if bitcoin is said to be useless. If you want to be patient and do not rush to act I'm sure bitcoin will find its true identity again and you will regret it.
I am agree with your disagreement bitcoin is best as an investment we are now using bitcoin for a lot of purposes, we are investing in bitcoin, we are earning through bitcoin even we are actually living with bitcoin, but people who call it useless are those who are lack of knowledge about bitcoin if they will know who profit worthy bitcoin is then I am sure they would make bitcoin investment with all money they have in pocket.