Understand the technology.

Proof of Work uses computational effort to help determine block production and secure a network; Bitcoin is its best-known example. Proof of Stake selects validators who commit assets and can be penalized for certain faults; Ethereum uses proof of stake. Neither is risk-free, and the designs have different resource needs and trust assumptions.

A coin is typically native to a network, such as BTC on Bitcoin or ETH on Ethereum. Tokens may be created through smart contracts on an existing network. A smart contract is code that executes according to on-chain conditions, introducing both useful automation and software risk.

Stablecoins are designed to reference another asset, often a national currency. Some rely on an issuer and reserves; others use crypto collateral or algorithmic mechanisms. Stability depends on design, redemption arrangements and market conditions and can fail.

Wallets manage the keys used to authorize transactions. A self-custody wallet gives you direct control but also direct responsibility for backups. Never share private keys, seed phrases or one-time authentication codes. Confirm networks and addresses before sending cryptocurrency.

Decentralized finance protocols use smart contracts for trading, lending and similar functions. Liquidity pools, bridges and external price feeds introduce additional risks including liquidation, contract vulnerabilities, slippage and governance issues.

Read official documentation, check who maintains the protocol, understand the token's utility and supply mechanics, confirm security audits and examine governance and concentration risks. A social media trend or a ticker symbol is not reliable due diligence.