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Oasis Network is the next ETH killer but before it was EOS, Cardano, Chainlink, Tezos and a few more, get busy gathering these good projects and stop expecting them to be the ETH killer, not killing ETH won't stop them from becoming very useful smart contract project in this space.
There are Solana, Polkadot, Binance Smart Chain, Polygon are gaining popularity with developers and projects because of the inefficiency of Ethereum to meet up with the demand and the transaction charges are really high and if you are looking for speculative rally in terms of price then you need to wait to see huge investments coming into these mentioned projects.