i think these type of post are posted by those persons who don't know about bitcoins in a better way . i hope they will know about it very soon and will also get a better profit through bitcoins .
Some people think that way because they dont yet earn through it or dont trust bitcoin to put their money, we have all opinions regarding that and not because the price is low means it will be gone. bitcoin established its potential and i believe there will be further progress in the future.