How do we know if the COIN or ICO is good? Is there any sign you can teach?
Read their whitepaper and understand with their future planning. Read from people's feedback about them also the best way.
if you join in successful ico after one or two week you will get x2 or x3 profits Easily .
Ussually when you waited for 1 or 2 weeks, the price still below than ICO price because too many people dumped the coin.