1. 比特币：
比特币是一种数字货币，无需任何中央机构即可在点对点 (P2P) 网络上传输。它是由中本聪在 2008 年由一个人或一群人发明的。所有的交易都存储在一个不可变的分布式账本中。
2. 以太坊：
以太坊是一个基于区块链的分布式平台。以太坊的网络货币被称为以太(ETH)。在这里，交易也存储在一个不可变的分布式账本中。
比特币和以太坊的区别：
| Sr. No. | Bitcoin | Ethereum |
|---|---|---|
| 1 | Bitcoin was invented by a person or group of people with the name Satoshi Nakamoto in 2008. | Ethereum was proposed by Vitalik Buterin in 2013. |
| 2 | The purpose of bitcoin was to replace national currencies during the financial crisis of 2008. | The purpose of ethereum was to utilize blockchain technology for maintaining a decentralized payment network and storing computer code. |
| 3 | It does not have smart contracts. | Ethereum allows us to create smart contracts. Smart contracts are computer code that are stored on a blockchain and execute when the predetermined terms and conditions are met. |
| 4 | Smart contracts are not present in it. | Smart contracts on ethereum are written in programming languages like Solidity, Vyper etc. |
| 5 | Generally, bitcoin transactions are only for keeping notes. | Ethereum transaction may contain some executable code. |
| 6 | Bitcoin runs on SHA-256 hash algorithm. | Ethereum runs on Ethash proof-of-work algorithm. |
| 7 | The block time of bitcoin is 10 minutes. | The block time of ethereum is 12 to 15 seconds. |
| 8 | The bitcoin blockchain has a block limit of 1 MB. | The ethereum blockchain does not have a block limit. |
| 9 | Bitcoin is the most popular digital currency in the market till date. | Ethereum is the second-largest crypto-currency after bitcoin till date. |