ICO's creation was exponential in late 2017, I believe the story will repeat in 2018, nonetheless good existing projects will materialize so basically 2018 will be the ICO year. You will need very good judgement when it comes to investment, lots of good looking projects with huge issues, search for little market cap and ALWAYS do a research on the team, these are the two main indicators that will separate a good project from a scam/trash project.