How does Polkadot crypto come to 7th position? is a scam?

I would like to have your opinions

Coinmarketcap:
https://coinmarketcap.com/en/currencies/polkadot-new/
Website:
https://polkadot.network/

Polkadot How does this crypto coming out of nowhere appear in 7th position even though it was in 5th or 6th position when it is currently going down? it's a Pump and dump.

Or is it a crypto that will one day be reliable with a good future Huh

is it a standalone crypto that has not been launched on ethereum?