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.
Ethereum is another use-case for a blockchain that supports the Bitcoin network, and theoretically should not really compete with Bitcoin. However, the popularity of ether has pushed it into competition with all cryptocurrencies, especially from the perspective of traders. For most of its history since the mid-2015 launch, ether has been close behind bitcoin on rankings of the top cryptocurrencies by market cap. That being said, it's important to keep in mind that the ether ecosystem is much smaller than bitcoin's: as of January 2020, ether's market cap was just under $16 billion, while bitcoin's is nearly 10 times that at more than $147 billion.
If you have wondered why sites that give away free cryptocurrencies exist at all, here is the answer; Sites and apps that offer you a way to get free Ethereum make their money from advertising, and sometimes by using your CPU to help with their mining activities. They are also introducing you to cryptocurrency, in the hope that you will buy related services from them later.
More importantly, though, the Bitcoin and Ethereum networks are different with respect to their overall aims. While bitcoin was created as an alternative to national currencies and thus aspires to be a medium of exchange and a store of value, Ethereum was intended as a platform to facilitate immutable, programmatic contracts, and applications via its own currency.
That’s not to say there aren’t risks in DeFi. Many are worried that the frenzy around speculative activities such as “yield farming” and interconnected leverage could set off a systemic crisis. If that happens, maybe Bitcoin can offer an alternative, more stable architecture for it. Either way, ideas to improve DeFi are coming all the time – whether for better system-wide data or for a more trustworthy legal framework. Out of this hurly burly, something transformative will emerge. Whether it’s dominated by Ethereum or spread across different blockchains, the end result will show more cross-protocol synergy than the chains’ warring communities would suggest.
Ripple - Bitcoin - Ethereum - EOS: Bill Gates interview How the world will change by 2030 #crypto