Participation in ICO or investment at pre-ICO stage is a very risky step. Its just like purchasing a shop on 40th floor and the ground floor of that shopping mall is just start to build.
There are so many ideas/concepts is trying to prevail in the market but is there any formula to separate strong project from scams/weak projects.

Which scale should an investor use to go before investing in a coin? Is it the code, or the system it based, or their community strength, or is it depends on their venture capital that how much big it is?