there is token just finished ico and the price 1$ and some people sell 1000 token. I mean what happen if no one want to buy this token. is that make project die?
Price will be as is and will continue to be 1$ so long as no one will create a sell order lower than 1$. Keep in mind that price is reflected only when someone bought and sold some tokens and with that in mind, so long as no trades below 1$ you should not worry about it. If someone puts a sell order lower than 1$ it also would not mean that the project will die. The only bad sign of a coin turning into a shitcoin is when it is slowly decreasing to 1 satoshi from 20 or more without an increase at all for a long time.