Back in 2015, all you could potentially do was deliver ETH from 1 Ethereum account to another. Here are just some of stuff you can do now. "This staked ETH then acts as collateral that could be ruined If your validator behaves dishonestly or lazily." Any person can use Ethereum—It https://oncedirectory.com/listings12705684/the-smart-trick-of-ethereum-that-no-one-is-discussing