The potential applications of Ethereum are wide-ranging and are powered by its native cryptographic token, ether (commonly abbreviated as ETH). In 2014, Ethereum launched a presale for ether, which received an overwhelming response. Ether is like the fuel for running commands on the Ethereum platform and is used by developers to build and run applications on the platform.
There are legitimate concerns about security on Ethereum. With such a complex system, and so many different programs running on it, the attack surface is large. And given the challenges the community faces in migrating to Ethereum 2.0, including a new proof-of-stake consensus mechanism and a sharding solution for scaling transactions, it’s still not assured it will ever be ready for prime time.
You earn free Ethereum by spinning a wheel of fortune wheel. The number of spins that you can have is determined by the “energy” that you have in reserve. Energy regenerates itself slowly, or you can watch videos to top up your energy faster. You need to accumulate 10,000 Gwei before you can withdraw your winnings. But, that doesn’t take as long to do as you have thought.