i have the same thoughts about the curve too thats one of the reasons i don't think bitcoin is in a bubble although i think some ico's are over hyped. I also believe that most people have herd of bitcoin and the growth over the years and they are jealous they missed the boat (like i did) but i did my own research and found we are still at the beginning of the curve and there is still money to be made. i think their jealousy forces them not to accept that they missed out and they convince their selves that it must be a scam or ponzi scheme.