There's been a lot of hype surrounding Polkadot these days. The alternative smart contract platform is definitely faster and cheaper to use than Ethereum itself. It's already within the top ranks in market cap. Yet, people have forgotten about Binance Smart Chain these days. This smart contract platform is as cheap and fast as Polkadot (someone correct me if I'm wrong), serving as a great alternative to the Ethereum blockchain. What these platforms lack is a solid number of dApps to overcome Ethereum. There doesn't seem to be any indication that developers are going to build new and exciting dApps on both chains. As long as Ethereum has the most dApps and tokens, its rivals won't be able to stand a chance against it.