In our experience another important point to a successfull ICO is to start this with enought money for makerting.
When you try to announce the ICO you will find this:
- The ICO listing sites the majority will charge you for adding you to their site.
- The influencers will charge you more than the ICO listing sites.
- Google Ads wil charge you too.
- ...

If you want if you want to have a satisfactory ico starts with around $10.000 (as minimum) only for marketing.