I have seen a few projects like QKC, CMT ... They are very well evaluated projects and there are a lot of famous people investing in it. But in the end, these projects turned into scams and did not meet the expectations of investors, they were failed projects in this market.
many very large platforms do scams, some cases often occur on platforms where exchanges, cases that I know of at the last exchange place are where BCNEX exchanges do scams even though when they are bidding on investors they get a hardcap but some time later the website can't withdraw assets and until now it can't be opened and the problem isn't over.