Now it is a very big competitions among cryptocurrency startups and very often after the listing the price of the tokens falls and it provokate investors to sell tokens.
And this has become commonplace lately, which ends up harming many projects, which shouldn't happen, but I believe most of them are investors who don't know how the crypto-market works...
Perhaps one of the factors why the price of tokens falls after listing is the uncertainty of investors in the long term viability of the project.