bitcoin is an outstanding digital currency. Bitcoin has really great potential, so we must believe in it, believe in its development, and believe in the possibility of making profit, peoples who say that it has no potential are wrong.
People who don't have knowledge of bitcoin will only say those stupid things that bitcoin is dead or don't have potential to grow in future but the existing users are well aware about the qualities that it holds.
Sometimes though, people start spreading rumors like bitcoin is going to die or price is going to drop, just so others start dumping their coins making the price lower so that they can actually buy into it for a lower price.
It is either you listen to them and become an unbeliever or you let them be and when the price goes down, you take advantage of it and buy more bitcoin. You will take profits if you do the latter. I believe in bitcoin and I will continue to believe even how hard they try to bring bitcoin down.