I strongly agree on your opinion that, if there is no demand then the price will go to 0$ but as mentioned above, that's unrealistic and impossible to happen. And adding also my opinion that, it doesn't people at a certain level only stop buying at a certain price if that happens the next thing that the sellers will do is to drop proces until a buyer will match their price. In addition, as long as exchanges are a thing there will always be sellers and buyers and even if worthless shitcoins are still being traded because people are looking for ways to make money on them. On the other hand, we don't want this thing to happen but if it happens there will be a fall in price because it is the level of demand that always propel the price.