Reentrancy
A type of smart-contract vulnerability where an external call is allowed to re-enter the contract before the first call finishes, often letting an attacker repeatedly withdraw funds. Reentrancy was the cause of the infamous DAO hack in 2016.
Mike Starr
Founder, CryptoWizardTools · M.S. Organizational Management
Last reviewed: August 2026
Related Terms
Capitulation
A moment when investors give up hope and sell en masse, usually near the bottom of a market decline. Capitulation is characterized by panic, high volume, and sharp price drops, and is often seen as a potential sign of a bottom forming.
Hard Cap
The maximum amount of money a token sale or fundraising round intends to raise. Once the hard cap is reached, the sale closes. It is distinct from a token's max supply, which refers to the total number of tokens that will ever exist.
Multi-Signature Wallet
A crypto wallet that requires approval from multiple private keys before a transaction can be executed. For example, a 2-of-3 multi-sig wallet requires 2 out of 3 designated keyholders to approve any outgoing transaction. Often used by teams and DAOs for added security.
Sandwich Attack
A form of MEV exploitation where a bot spots a user's pending swap, buys the token first (pushing the price up), lets the user buy at the inflated price, then sells — profiting from the user's trade at the user's expense.
ICO
Initial Coin Offering. A fundraising method where new cryptocurrency projects sell tokens to early investors to raise capital for development.