Polkadot has been consistently showing good potential and great volume in the coinmarketcap so its position isn't doubtful or questionable. It's a good project with a strong foundation that has caught the attention and trust of most investors. It still needs lots of developments in the future but it has been continuously moving positively so I'm sure that it could grow more in the future.
Couldn't agree more with you, mate. Polkadot is one of the very few legitimate projects in the crypto/Blockchain space that will last for long. It might become as good as Ethereum sometime in the future. I wouldn't say it's a scam, since it's backed by prominent developers in the industry. Being founded by one of Ethereum's co-founders, I'd say this project has potential to become one of the best smart contract platforms in the world. DOT will live alongside ADA, and ETH, for many generations. That is if Polkadot remains decentralized and censorship-resistant.
Nonetheless, it seems to me that Polkadot will be here to stay. The competition is getting fierce as new smart contract platforms emerge in the crypto/Blockchain space. While Ethereum is still the leader in the industry, there's ample room for growth for other alternatives like Binance Smart Chain, Cardano, and Polkadot itself. Who knows how big DOT will grow in the future? It may be the fifth-largest cryptocurrency by market cap now, but it could rise all the way to the moon if popularity increases at a fast pace. Imagine if DOT becomes the third-largest cryptocurrency by market cap after Ethereum? It would certainly gain the attention of people in the mainstream world. I see Bitcoin, Ethereum, and Polkadot as the leaders of the crypto/Blockchain industry in the not-so-distant future. Just my thoughts