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Crypto,
term by term.

Every word that trips people up, in plain English. No jargon explaining jargon, just clear definitions you can actually use.

40 terms

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  • 2FA (Two-Factor Authentication)

    Security

    A second check on top of your password, usually a code from an app on your phone. Even if someone steals your password, they still can’t get in without it.

A

  • Altcoin

    Basics

    Any cryptocurrency that isn’t Bitcoin. The word is short for "alternative coin" and covers thousands of projects, from Ethereum to tiny new tokens.

  • AML (Anti-Money Laundering)

    Regulation

    The rules that stop criminals from hiding illegal money through crypto. They’re the reason regulated platforms ask who you are and where your funds come from.

  • ATH (All-Time High)

    Markets

    The highest price a coin has ever reached. It’s a useful reference point, but it’s no promise the price will ever return there.

B

  • Bear market

    Markets

    A long stretch where prices are falling and most people feel gloomy. The opposite of a bull market.

  • Bitcoin

    Basics

    The first and best-known cryptocurrency, launched in 2009. It’s digital money that runs on a worldwide network with no bank or government in charge.

  • Blockchain

    Basics

    The shared digital record that crypto runs on. Think of it as a public notebook, copied across thousands of computers, where every transaction is written down and can’t be quietly changed.

  • Bull market

    Markets

    A long stretch where prices are rising and people feel optimistic. The opposite of a bear market.

C

  • Coin

    Basics

    A cryptocurrency that has its own blockchain, like Bitcoin or Ethereum. It’s the native money of that network (unlike a token, which is built on top of one).

  • Cold storage

    Security

    Keeping crypto completely offline, so hackers on the internet can’t reach it. People use it for coins they don’t plan to touch for a while.

  • Custody / Custodian

    Security

    Who actually safeguards your crypto. A custodian is a regulated company that holds the keys for you, so you don’t have to worry about losing them yourself.

D

  • DCA (Dollar-Cost Averaging)

    Strategy

    Buying a small, fixed amount on a regular schedule — say a little every week — instead of trying to guess the perfect moment. It smooths out the ups and downs over time.

  • Decentralization

    Basics

    When no single company or person is in control — the system is run by many computers around the world. It makes a network harder to shut down or censor.

E

  • Ethereum

    Basics

    The second-biggest cryptocurrency, and a platform that lets developers build apps and tokens on top of it. Its coin is called Ether (ETH).

  • Exchange

    Basics

    A platform where you buy, sell, and trade crypto — a bit like an online currency bureau. Rumos lets you do this straight from the app.

F

  • Fiat

    Basics

    Ordinary government money like euros, dollars, or pounds. "Fiat" is just the word crypto people use to tell it apart from cryptocurrency.

G

  • Gas fee

    Markets

    The small charge you pay to make a transaction go through on a blockchain. It rises when the network is busy and falls when it’s quiet.

H

  • Halving

    Basics

    A scheduled event where the reward for mining new Bitcoin is cut in half, roughly every four years. It slows down how fast new coins are created.

  • HODL

    Strategy

    Crypto slang for holding onto your coins through the ups and downs instead of selling in a panic. It started as a typo of "hold" and stuck.

  • Hot wallet

    Security

    A wallet that stays connected to the internet, so it’s handy for everyday buying and spending — but a little more exposed than cold storage.

K

  • KYC (Know Your Customer)

    Regulation

    The quick identity check you do when signing up — usually a photo of your ID and your face. It’s a legal requirement that keeps regulated platforms safe and above board.

L

  • Ledger

    Basics

    A record of who owns what. On a blockchain the ledger is public and shared, so everyone can agree on the balances without trusting a middleman. (Ledger is also a popular brand of hardware wallet.)

  • Liquidity

    Markets

    How easily you can buy or sell something without moving its price. High liquidity means there are plenty of buyers and sellers, so your order fills quickly and fairly.

M

  • Market cap

    Markets

    The total value of all of a coin’s units added together — its price multiplied by how many exist. A bigger market cap usually means a more established coin.

  • Mining

    Basics

    The process some networks use to confirm transactions and create new coins, done by computers solving hard puzzles. Bitcoin works this way.

N

  • NFT (Non-Fungible Token)

    Basics

    A one-of-a-kind digital item recorded on a blockchain, like a piece of art or a collectible. Unlike a coin, each NFT is unique and can’t be swapped one-for-one.

P

  • Private key

    Security

    The secret code that proves you own your crypto and lets you move it. Anyone who has it controls your funds, so it must never be shared.

  • Public address

    Security

    Your wallet’s shareable "account number" — the string of characters people send crypto to. It’s safe to give out, unlike your private key.

S

  • Seed phrase

    Security

    A list of 12 to 24 simple words that can restore your entire wallet if your device is lost. Write it down, keep it offline, and never type it into a website.

  • SEPA

    Payments

    The standard way to move euros between bank accounts across Europe. On Rumos it’s how you deposit and withdraw cash, usually within a day.

  • Smart contract

    Basics

    A small program that lives on a blockchain and runs automatically when its conditions are met — like a vending machine for digital agreements, with no middleman needed.

  • Spread

    Markets

    The small gap between the price to buy and the price to sell at any moment. A tighter spread means you’re getting a fairer deal.

  • Stablecoin

    Basics

    A cryptocurrency designed to hold a steady value, usually pegged to a currency like the dollar or euro. People use it to park funds without the wild price swings.

  • Staking

    Strategy

    Locking up some of your crypto to help run a network, and earning rewards for doing so — a bit like interest on a savings account. It only works on certain coins.

    Rumos doesn't offer staking.

T

  • Token

    Basics

    A cryptocurrency built on top of an existing blockchain rather than having its own. Many tokens live on Ethereum, for example.

V

  • Volatility

    Markets

    How much and how fast a price swings up and down. High volatility means bigger possible gains — and bigger possible losses.

  • Volume

    Markets

    How much of a coin has been bought and sold over a period, usually the last 24 hours. High volume signals lots of activity and interest.

W

  • Wallet

    Basics

    Where your crypto lives. Rather than holding coins like a purse holds cash, a wallet stores the keys that let you access and move your funds.

  • Whale

    Markets

    Someone who holds a very large amount of a coin — enough that their buying or selling can nudge the whole market.

Y

  • Yield

    Strategy

    The return you earn on crypto you put to work, for example through staking. It’s usually shown as a yearly percentage, like interest.

    Rumos doesn't offer yield.

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Crypto prices can go down as well as up. Only use money you can afford to lose.