The narrative has changed. It used to be Is Bitcoin a scam? now its how high do you think the price will go. Institutional money is on its way people.
Matthew Goetz from 'Block Tower Capital' stated in front of a capacity crowd at Consensus; "Bitcoin to 60k in 2018"
Maybe because it is easy for them to create one that is why scamming is not a hard thing to do.I suggest search and gather information about a particular ICO or project before exerting efforts and giving much time or investment.