A project or piece of technology is decentralized when no single person or entity is in control of it. Bitcoin is decentralized because no single person one can change or control it. Decentralization is the bedrock upon which every piece of crypto technology is built. Typically the more decentralized the more valuable

The term web3 is an umbrella term to refer to multiple trends in the internet where technology and people are moving away from centrally controlled apps to more decentralized blockchain-based technology

A misspelling of the word hold. By switching out the word hold for hodl you immediately gain 10 clouts with crypto bros.

CBDC (Central Bank Digital Currencies)
A government issued fully digital currency. Depending on the implementation it could either be built on the blockchain or it completely controlled by the government.

Altcoins "alts"
Any crypto coin that is not Bitcoin.

Hot Wallet
A hot wallet is a wallet stored on an exchange. These are typically targets for hackers and not very secure.

Cold Wallet
Any wallet that is not connected to the internet. This could be in the form of a USB device, or on a computer that is not connected.

A service that anonymizes cryptocurrency through mixing a pool of transactions together. Mixers are a vital part to keeping privacy.IPFS (Inter-Planetary File System)