There are lots of projects doing ICO.
As an investor of cryptocurrency, you might have some critical points of determination on you will go into ICO or not. What's the most important factor you decide to participate on ICO? And how do you judge the scam?
Please share your opinions.

You need to do some research and investigation to avoid scam. Check if there are visible office and if there are directory you can simply call it. if it is in the building google the desk information of the specific building if there is an office or company that rent there. Check the background of the developer and its team if they have a history of god or bad reputation. What problem are they gong to solve to contribute in the future using blockchain technology.