At the time of the ATH or would you rather sell when you are down -90%? Just so you know most alts will pump at the initial or some days after the listing, your best moves will be to sell while the price is high then decide whether to buy back in at a much lower price.
Most project nowadays usually distribute their token through airdrop and most of these projects usually get dump at the initial stage, most of the whales will instantly dump their allocation and dip the price.
Imo, better to sell when the price is at a good price, you don't want VCs to dump their bags on you.