Absolutely no. Polkadot reached the 7th position because of its market performance and stability, no illegal activities at all. If you will follow polkadot project and team, you will notice the credibility and efficiency of the project plans. In fact, polkadot in expected to increase more its market value for the next few months based on what I read in telegram channel.
As far as I know, polkadot can grow this far thanks to his team,
they really work hard and the result is that polkadot can even be ranked 5th,
and of course we have to give appreciation to the team,
and I also believe that polkadot can develop even further