Because It is not easy to understand all of the Platform/System that implement by bitcoin. When people do not know, they may fear this technology.
People are now aware of bitcoin if some of them are not aware of it then it is lack of knowledge and information. According to me it is very important to discuss about bitcoin because with the help of this discussion people will know about bitcoin and they will get the right time to invest in bitcoin, increasing demand and price of bitcoin is something worthy so in future it is going to be more famous and more expensive by price.
Many people just hope when they buy bitcoin and then the next day they get profit and rich, most of them think that bitcoin is an instant way to succeed and get rich so when the price goes down they panic and sell cheaply.