Even thought it depends from a project, I am scared of buying at presales. I have seen to many examples how early buyers, bounty hunters, developers and etc drop their token at early possible moment and kill the price. I have seen so many examples how it took months, quarters and years for price to recover, which makes presales useless, as regular trading or pump and dumps give better profit in a shorter time period. And it is hard to get in a “good” project presale. Often insiders get all the presale tokens or most tasty part of pie, making a presale as usual sale.