What is ethereum and how does it work?

Based on blockchain technology, ethereum consists of a series of cryptographic, or secure, public records linked together that each are difficult to change because they are stamped with user data, time and date and changes that must be approved by all users. Automatic exchangers Eth to PayPal 

USD at good rates.On the ledger, anyone can create a financial contract or keep debt or ownership registries and eliminate the use of an external recordkeeper or trust officer. They're called "trustless" transactions because they eliminate the need for trusting the counterparty to the transaction since the contract is self-fulfilling. Because of its sweeping size and scope, ethereum's main technical problem has been speed and storage. It has operated at only a few transactions per second, with other crytpo platforms able to carry out hundreds. Users have complained of bottlenecks and the expense of using the platform. A recent report citing sources close to the project said ethereum developers are discussing an upgrade that could boost the technology's capabilities. The update, known as "ethereum 1x" is expected to potentially be rolled out in January 2019, and includes changes to help slow the ethereum blockchain's growth.