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The bottom is the lowest point of a price decline over a certain period of time, after which the price begins to rise or, at the very least, stops declining.

MACD is a technical indicator that assesses the strength and direction of a trend based on a combination of moving averages. It helps to find potential price reversal points.

Dividends are a part of profit distributed among the holders of an asset. In a broad sense, the ROI indicator reflects the return on investment and the yield on invested capital.

A derivative is a derivative financial instrument whose value depends on the price of an underlying asset. In the crypto market, derivatives are used to hedge risks and to speculate on changes in coin prices.

A dev is a colloquial name for a developer, that is, a specialist who creates and maintains the code of cryptocurrencies, blockchain protocols, wallets, and related applications. The development of a project largely depends on devs.

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.

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.

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.

Deflation is a sustained decline in the general level of prices in an economy over time, in which the purchasing power of the monetary unit grows. The phenomenon, the opposite of inflation, is often built into the design of cryptocurrencies.

DDoS is a distributed attack in which many devices simultaneously flood a server with requests to overload it and make it unavailable to ordinary users. It is a frequent threat to crypto exchanges and pools.