or Let's say more Startup project we have for now 5 project they are reall project each project give you good return everyday so of you invest for example :If you invest 10 USD in Ether we will keep 5 USD in our bank and we give the rest money 5 to the (company or the leader of the project )then he work daily . if something going wrong like these project is scam or stop we will ba k to you only 4USD so in these case you did not lose all your money but you lose some part.
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.
Decentralizing Everything with Ethereum's Vitalik Buterin | Disrupt SF 2017
This system is being fueled by a global innovation and development pool bigger than Bitcoin’s. As of June last year, there were 1,243 full-time developers working on Ethereum compared with 319 working on Bitcoin Core, according to a report by Electric Capital. While that work is spread across multiple projects, the size of its community gives Ethereum the advantage of network effects.
While both the Bitcoin and Ethereum networks are powered by the principle of distributed ledgers and cryptography, the two differ technically in many ways. For example, transactions on the Ethereum network may contain executable code, while data affixed to Bitcoin network transactions are generally only for keeping notes. Other differences include block time (an ether transaction is confirmed in seconds compared to minutes for bitcoin) and the algorithms that they run on (Ethereum uses ethash while Bitcoin uses SHA-256).
Speculators have often pushed the cryptocurrency market forward by merely selling their crypto-assets for fiat profits. However, Ethereum’s budding ecosystem allows for money to be spent and earned within its own internal economy. Although we are still a long way away from maturity, once Ethereum scales, these positive developments will surely accelerate.