It is open source, anyone can review it or create forks of it (although decentralized autonomous robots can’t create forks. Ether is like Bitcoin because its built on the blockchain, but the two are quite different in many ways.
Ethereum was not designed to be a currency; instead, Ethereum’s creator intended for ether to be used to pay for application specific operations or “smart contracts.” These actions could include financial exchanges online between 2 parties in any way that requires money. It could also facilitate businesses into accepting an alternative form of electronic payment other than profit-based currencies. The goal of Ethereum was to build a trustless system where users did not need to rely upon third-party services and computer systems which were vulnerable for hacking attacks by criminals.