🔗 BlockChain:

• A blockchain is a distributed (shared) database that is shared among the nodes of a computer network. As new data comes in, it is entered into a fresh block. Once the block is filled with data, it is chained onto the previous block, which makes the data chained together in chronological order.
• Different types of information can be stored on a blockchain, but the most common use so far has been as a ledger for transactions. In Bitcoin’s case, blockchain is used in a decentralized way so that no single person or group has control—rather, all users collectively retain control.
• Decentralized blockchains are immutable, which means that the data entered is irreversible. For Bitcoin, this means that transactions are permanently recorded and viewable to anyone.

💲 CryptoCurrency:

• A digital currency in which transactions are verified and records maintained by a decentralized system using cryptography
• There are many types that are very different from each other
• Bitcoin is a new electronic cash system that’s fully peer-to-peer, with no trusted third party. All use blockchain, but not all are equally distributed.
• Crypto is growing substantially. El Salvador now accepts Bitcoin as currency.
• Crypto allows you to transfer money without charges.

➿ DAOs:

• A decentralized autonomous organization (DAO) is an entity with no central leadership. Decisions get made from the bottom-up, governed by a community organized around a specific set of rules enforced on a blockchain. ... Decisions are made via proposals the group votes on during a specified period.
• Examples: A charity – you can accept membership and donations from anyone in the world and the group can decide how they want to spend donations. A freelancer network – you could create a network of contractors who pool their funds for office spaces and software subscriptions.

💸 DeFi:

• Decentralized Finance
• DeFi is a collective term for financial products and services that are accessible to anyone who can use Ethereum (A blockchain cryptocurrency) – anyone with an internet connection.
• With DeFi, the markets are always open and there are no centralized authorities who can block payments or deny you access to anything.