HODL is a slang term for the strategy of holding cryptocurrency long-term without selling during market swings. The term has become iconic in the crypto community and describes the "buy and hold" approach.

Double spending is an attempt to spend the same coins twice. This is a key problem of digital money, which the blockchain solves using a distributed ledger and transaction confirmations.

A DApp is an application whose backend logic runs on a blockchain through smart contracts, without a single central server or controlling owner. The code is open and operates according to predefined rules.

Bitcoin is the world's first decentralized digital currency, running on blockchain technology without a single issuer or intermediaries. It is the foundational asset of the entire cryptocurrency market.

A Bitcoin Investment Trust is a company that invests funds in Bitcoin and takes on its purchase and storage, sparing the investor the technical complexities.