A big discount on the pre-sale may turn into a dump after entering the stock exchange. To avoid this, you need a finished work product from the project.
the collapse in the price of coins depends on how many coins will be sold to investors immediately after the release of the coin on the exchange
With large bonuses, investors can sell tokens even at a low price without waiting for the moment when the coin starts to rise in price . this should be taken into account .
I think smart investors will never sell their tokens at low prices. We just need to wait for the end of ICO, exchange listings and earn good profit