It is very simple. After ICO is over you must carefully watch the price of assets of this ICO and also for their product. If their product in not working or unpopular o absent then this ICO was scam or simply unsuccesful so you do not need to invest money in such ICO. Also if asset of ICO is loosing value over time comparing to ICO prices so it is useless to make an investment into such ICO. Hope this helps.



But really... barely