Initial Coin Offering
A fundraising mechanism where a blockchain project sells newly created tokens to early investors in exchange for established cryptocurrencies like Bitcoin or Ethereum. ICOs were especially popular in 2017 but carry significant regulatory risk.
Why It Matters
An Initial Coin Offering (ICO) is a fundraising strategy where new coins are sold to investors in exchange for established cryptocurrencies. This method can rapidly generate capital for projects but also carries risks, so understanding it is crucial.
Example
For instance, a startup might launch an ICO to raise funds by selling its new token for Ethereum. Investors hope to profit if the token appreciates after the ICO concludes.
Beginner Context
For beginners, ICOs are a common method for new projects to gain funding in the crypto space. It's important to research before participating, as the market can be risky but also offers potential rewards.
Mike Starr
Founder, CryptoWizardTools · M.S. Organizational Management
Last reviewed: August 2026
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Off-Chain
Any transaction or data that occurs outside of the main blockchain. Off-chain activity can be faster and cheaper than on-chain transactions but may sacrifice some of the security and transparency of the main network.
Arbitrum
A popular Layer 2 scaling solution for Ethereum that uses optimistic rollups to process transactions faster and at a fraction of the cost. Arbitrum is compatible with existing Ethereum smart contracts and developer tools.
Fiat Currency
Money issued by a government that is not backed by a physical commodity like gold. Examples include the US Dollar, Euro, and British Pound. In crypto, fiat is often used as the starting point to buy digital assets.