The main reason why ICO price dump because project developers or team list tokens on cheap Exchanges that is the main reason not the urgent selling of holders that is the most reason why i think, and one os the bad conditions of the market but look at yanu project they have make ico well and waiting for the good conditions of the market until they list tokens,and they do another way to make fund raising IEO and you can buy tokens for the yanu
https://exmarkets.com/launchpad.