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So far in this section, we have not discussed other ways of producing coins besides Proof-of-Work mining. However, in some alternative cryptocurrency systems, it is possible to create pre-mined coins, at no cost, with no Proof-of-Work, before the main blockchain is launched. Projects such as Ethereum called for the pre-mining of a vast majority of the circulating supply of coins, which were sold to insiders at a fraction of miners’ cost of production. Combining a pre-mine with Proof-of-Work mining for later coins is not necessarily a dishonest practice, but if undisclosed, gives the erroneous impression that all coins in existence have a cost-of-production value. In this light, Ethereum’s stated transition to Proof-of-Stake should be viewed with some skepticism.Here are a few popular algorithms:символ bitcoin ethereum gas pro100business bitcoin

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Public Blockchain ledgers are visible to all the users on the internet and any user can verify and add a block of transactions to the Blockchain. Examples, Bitcoin, and Ethereum.

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Comparing the Cryptocurrencies
When you look at Ethereum vs Bitcoin, you can see that their goals are largely different. Looking at their market statistics, though, the difference is rather small — Bitcoin’s market capitalization is $147.3b while Ethereum’s market capitalization is $84.2b.
Note: market capitalization (often referred to as “market cap”) is the total value of all coins in existence. For example, Bitcoin’s $147.3b market cap means the value of all Bitcoins together is $147.3b.

So, besides statistics, how exactly do Bitcoin and Ethereum match up?

Many beginners in cryptocurrency believe that Ethereum is only as a financial currency, like Bitcoin. This is wrong for many reasons; let’s look at the basics.

Ethereum vs Bitcoin: The Basics
Here I will look at some of the features and facts of Bitcoin and Ethereum.

Bitcoin
Launched in 2009, Bitcoin was the first cryptocurrency and the first use of blockchain technology;
Bitcoin is a digital currency;
It aims to fix the problems in global finance, often referred to as the “bank of the people”;
Bitcoin does not require a third party, such as PayPal or a bank;
Created as an alternative to regular/fiat currencies (i.e. USD, EUR, JPY, etc.);
Used for manual transactions, like purchasing goods/services or receiving money;
It is highly liquid (it's the trading volume is $8.9m in the last 24 hours), which means you can easily convert Bitcoin into cash;
It takes minutes to complete Bitcoin transactions.
Ethereum VS Bitcoin: Bitcoin front page.

Ethereum
Launched in 2015, Ethereum’s blockchain widely known synonym is “Blockchain 2.0”;
Smart contracts program the transactions (which I will explain further in this guide);
Its smart contracts eliminate the need for third parties in many systems, not just financial ones;
It provides a platform to build smart-contract apps (known as dApps);
It provides a programming language, called Solidity, to build the dApps with;
Ether is its currency, it powers transactions on the Ethereum blockchain;
Ether is highly liquid (its trading volume is $2.4m in the last 24 hours);
Ethereum’s transactions take seconds to complete.



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