Excuse me, could you please clarify your question? It seems like there might be a bit of a misunderstanding.
Ethereum itself is a blockchain platform that supports the creation of decentralized applications and smart contracts. It's not a service that supports other coins, but rather a platform where various tokens and decentralized applications can be built and operated.
However, if you're asking about which coins or tokens can be stored or traded on the Ethereum blockchain, then the answer would be that Ethereum supports ERC-20 tokens, which are tokens that follow a specific set of rules and standards that allow them to be compatible with the Ethereum blockchain. There are many different ERC-20 tokens, and they can be traded, stored, and used in various decentralized applications and exchanges that are built on top of the Ethereum blockchain.