each project will produce a roadmap of what, when, and how to do it before delivering it. According to me, if project linked to the roadmap it's not scam. those who do not go according to the roadmap they have determined other than that, they are definitely cheaters. I do not mean delays due to density. they are except for what I say. the professions and legal personality of the team members are certainly important. real profiles and people are definitely important details for a project.
Sometimes these road maps have long dark periods where the coin slowly declines in price because other coins steal the spot light. Hype train is a real thing