I think that depends on the prospect of the ICO project that has joined. If the prospect of the project promises with a good concept, many investors will hold the token/coin longer. I think the low price that has been marketed is balanced with the bonus that investors get when buying during ICO. That difference is if investors buy coins in exchange, investors do not get additional and only buy coins based on prices at that time. So i think it's better to buy coin during ICO.