There were numerous projects that ended nowhere. However, if you dive in, you would find out there some particular similarities among them. Vague, tough for understanding completely or immature idea. No particular steps have been done for project feasibility. Insufficient details of idea implementation, etc. All of these are a red flags for potential investors. I suggest that a thorough due diligence should be performed before investing. Especially it relates to projects where nothing has been done but idea with related marketing materials. You can check up on our product and ensure that we are different from that.