There are many smart contract platform that will compete with ethereum in the future, but I believe with the current market cap of ethereum, Ethereum will remain the top smart contract coin.
Terra, Fsn, and Hoo. these three platforms have low cost and they focus on financial system, we can do fast delivery transactions at low cost and if new platforms continue to be developed I think they will be an option for long term investment, as every developer will take advantage of the popularity of each platform before developing a new project.