Cardano, founded by one of the first Erthereum developers by Charles Hoskinson, is a decentralized platform that provides a reliable and scalable complex programmable transfer of value. It is based on technology designed to create a new decentralized economy and democratize finance in emerging markets. Cardano seeks to become a platform for smart contracts by developing a new functional programming language known as Haskell, which allows "to write in a more secure and reliable way because it has a mathematical approach." It will surpass the etherium, I believe it.
These are good points, but we should know that Ethereum has gain ground in many areas in this cryptocurrency industry , so we should not imagine that the competitors will destroy ether overnight, so we have to leave everything in the hands of the future because the future will tell.