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Glossary
n
- NFA NFA stands for Not Financial Advice. If you’ve spent more than five minutes on Crypto Twitter, YouTube, or Discord, you’ve definitely seen the letters NFA. It’s one of the most common acronyms used in the space, from big-name influencers to casual traders. Since the crypto space moves fast, you see expert opinions flying everywhere. And since giving actual financial advice often requires a professional license and comes with serious legal responsibilities, people use NFA as a disclaimer. It’s a way for someone to share their excitement about a new coin or a chart they’ve analyzed while making it clear that they aren't your financial advisor. Essentially, it’s a "don't sue me if this goes to zero" safety net. It reminds the reader that the responsibility for the trade lies with them, not the person posting. Many crypto personalities put "NFA / DYOR" (Do Your Own Research) right in their social media profiles to cover all their posts at once. You might see it in X posts where people hype up a token or say that an ecosystem is going to the moon! They remember to accompany that with an NFA caveat.
- NFT An NFT, or Non-Fungible Token, is a digital asset that is unique and can be used as a proof of ownership of a unique object. The fundamental distinction between currencies such as Bitcoin or Ethereum and NFTs is that the latter is unique. A blockchain keeps the record of the ownership of each token, which means that two tokens cannot have the same value and one cannot be replaced by another. NFTs are mostly associated with artwork, music, collectibles, photos, virtual land, and game items. The purchase of an NFT grants the buyer a verifiable, blockchain-validated certificate that he is the owner of that item. When the NFT is held by its owner, he owns the original token that the blockchain recognizes as legitimate, even if there are replicas of the image or file on the internet. The main driver of the popularity of this technology is that it provides artists with new potential avenues for selling their work directly to buyers. The artists can create NFTs, determine their prices, and even receive royalties with each resale—these factors support the NFT market. On the other hand, collectors appreciate NFTs for the aforementioned attributes of rarity, traceability, and the fact that they own something digital that is scarce. An NFT is fundamentally an ownership proving tool for digital assets that is secure, transparent, and can be verified via the blockchain. Hence, it opens a new digital market for trading and non-fungible items.
- NGMI "Not Gonna Make It" is the go-to slang for calling out a total train wreck. Whether it's a sketchy project or just a really bad investment move, people use "NGMI" as a blunt, sarcastic way to say someone is headed for failure. It definitely sounds a bit mean, but it's basically the community’s way of giving a harsh reality check to anyone making rookie mistakes. It's the opposite of WAGMI, which means "We're All Gonna Make It" and spreads hope and happiness. Zyzz, a fitness influencer, made WAGMI popular, but NGMI, its opposite, was used to make fun of people who didn't have the self-control to reach their goals. By 2019 the term cropped up in Urban Dictionary entries, but it really took off in crypto during the 2020–2021 bull run. As memecoins, NFTs, and DeFi exploded on platforms like Reddit and Twitter, traders borrowed it to call out panic sellers, rug-pull projects, or anyone chasing bad hype. Almost everyone in crypto uses NGMI, from traders to degens, NFT collectors to crypto project founders. It's used more often during market dips or when a token crashes. Some real-world examples of how the term is used include "You sold your Bitcoin during a 10% dip? NGMI." It is addressing the panic selling in the market. NGMI is sharp and can sting, so it's not always friendly. It sometimes starts arguments on social media. But it also reminds people to think twice, do their homework, and avoid emotional trades.
- Node A node in crypto is nothing more than a computer or a similar device that is part of the blockchain network. These nodes keep track of transactions, check their authenticity, and also help prevent problems like double-spending (using the same cryptocurrency twice). The blockchain network is not monitored by a central authority. The nodes keep track of everything. For instance, when someone sends a Bitcoin, nodes all over the world check the blockchain history to make sure the sender has enough money. They send the transaction to other nodes if it is valid, and it is finally added to a block in the blockchain network. There are three types of nodes: Full nodes: they have the heaviest responsibility. They download and store the entire blockchain—currently over 700 GB for Bitcoin—allowing them to fully and independently validate every transaction and block. Light nodes: people also call them SPV nodes. They don't download the full blockchain. Instead, they just pull in the basic outlines (the block headers) and whatever details they need. They let the full nodes handle most of the checking. That's what makes them perfect for phones or anything that can't handle a giant download. Mining nodes: they always run alongside a full node. They round up all the transactions waiting to get confirmed, put them into a proposed new block, and then battle it out with other miners to solve a crypto puzzle. The one who cracks it first gets to slap that block onto the chain and walks away with the prize—freshly created coins and the fees from those transactions. This approach is precisely why cryptocurrency does not require middlemen like banks. The nodes carry out all verification tasks. There are simple requirements to be a part of the node system: a computer, software, and an internet connection.
- Non Custodial In crypto, non custodial could refer to a wallet or exchange where you're fully in charge of your cryptocurrencies and private keys. So only you have total control over your digital assets, as only you know the secret codes that let you access and spend your coins or tokens. No middleman, like a bank or centralized exchange, can hold onto them for you. It's your responsibility if something goes wrong, but that also means that no one else can freeze your account or mess with your money without your permission. When we talk about non-custodial wallets, we're talking about apps or hardware devices that only you can access. If you lose your recovery phrase, the company can’t "reset" your password because they never had access to it in the first place. Similarly, on a DEX, you swap coins directly from your wallet. The exchange never holds your money during the process. Fitting examples would be MetaMask or Trust Wallet; these are software-based non-custodial wallets. When you set them up, you’re given a 12-to-24-word seed phrase. That phrase is the literal key to your money. There are also cold storage hardware wallets like Ledger and Trezor. These wallets keep your keys offline, which makes them the best option for non-custodial security. You can also use platforms like Uniswap to trade crypto without giving a middleman control of your assets.
- Nonce In crypto, a nonce is short for "number used once." It is a simple but crucial number, usually a 32-bit integer, that miners change repeatedly to solve a mathematical puzzle and add new blocks to the chain. In proof-of-work systems like Bitcoin, each block has a block header with fixed information. This information includes the previous block hash, Merkle root (summary of transactions), timestamp, difficulty target, and the nonce. What happens is that miners take all this information, run it through a hash function, and get a hash with 256 bits. The network sets a difficulty target that the hash must be below a very small number (lots of leading zeros, e.g., starting with many 0s). Because the hash function is deterministic and extremely sensitive to input changes, even flipping one bit produces a completely different hash. Since most header fields are fixed, miners can't easily alter them without invalidating the block. The nonce is the adjustable field. Miners start with nonce = 0, hash the block, and check if the result meets the target. If not, increment nonce to 1, hash again, and repeat billions or trillions of times per second across the network. The "proof" in proof-of-work is the discovery of a valid nonce, which indicates that the miner actually put in computational effort. After being located, the block is added to the chain, broadcast, and confirmed by others. The block reward and fees are given to the victorious miner. Similar nonces were used for mining in Ethereum (prior to The Merge), but Ethereum also makes use of a transaction nonce, or a per-account counter, to guard against replay attacks and guarantee that transactions are completed in the correct order. Mining nonce transforms brute-force guessing into the energy-intensive competition that maintains the integrity and tamper-resistance of proof-of-work chains.