i do not understand exactly what you mean. you want to short the tokens that newly listed. if so maybe it is risky because the price trends are so much unpredictable in the beginning. i wouldnt do that.
Not exactly, If I see that new token moons (or just stays relatively high), but I belive that project is doomed and it will drop soon, then I would short It. I wouldnt worry about risk for me, because rearly token stays high for very long, but I dont know if somebody would take long end. I am not sure I would do it but the idea seems to be interesting.