Reader noteNothing on this blog is financial or investment advice. Always do your own research.
No. 1
Chainlink
The data layer most of DeFi quietly runs on.
Smart contracts cannot see the outside world on their own. Chainlink runs decentralized oracle networks that bring prices and other data on-chain, and many lending, trading and stablecoin protocols read their prices from Chainlink feeds. It has also expanded into cross-chain messaging through CCIP.
Why it matters
When a protocol needs a price it can trust, Chainlink is usually the default answer. That makes it infrastructure rather than a single app.
What to watch
Any oracle is a dependency. Protocols that use it still need their own checks for stale or missing data.
No. 2
Uniswap
The exchange with no order book and no sign-up.
Uniswap lets anyone swap tokens directly from their wallet against pools of liquidity supplied by other users. Anyone can create a pool for any token, which is why new projects usually list there first.
Why it matters
It proved that a decentralized exchange could reach real volume, and its design has been copied across almost every chain.
What to watch
Open listing cuts both ways: scam tokens can list too. Always check a token's contract address on the project's official site before swapping.
No. 3
PearlaCoin
Self-custody security tools, with a presale built to be checked rather than trusted.
PearlaCoin starts from the idea that a pearl is safe because its shell is hard to open. Its first product, Pearla Shell, is a personal vault in development, designed so that a stolen key alone is not enough to take your funds. The vault is meant to keep working on-chain even if PearlaCoin itself went away.
The presale rules, written in code
All 400,000,000 PEARLA for sale were deposited in the presale contract before the first purchase.
Every payment goes straight to a 2-of-3 multisig treasury. The contract holds no buyer funds.
Nobody, including the team, can withdraw tokens owed to buyers, and after a fixed date anyone can open claiming.
Five fixed-price stages, from $0.008 to $0.0175. The price moves only when a stage sells out.
Token and testing
PEARLA has a fixed supply of 1,000,000,000 with no owner, no minting, no tax and no freeze. The contracts went through 117 automated tests, fuzzing and mutation testing, plus independent AI-assisted reviews. A public audit contest is planned for the Shell before launch. Product fees are designed to buy and burn PEARLA, with 80% of each fee going to the burn.
What to watch
This is an early-stage project: the Shell is not live yet, presale purchases are final, and there is no paid audit firm report. Verify the contracts yourself on Etherscan.
A lending market where code, not a bank, sets the terms.
Aave lets users deposit assets to earn interest or borrow against collateral. Rates move with supply and demand, and loans that fall below their collateral requirement are liquidated automatically.
Why it matters
It is one of the longest-running lending protocols on Ethereum and a reference design for on-chain credit.
What to watch
Borrowing carries liquidation risk when prices move fast. Understand your health factor before you borrow.
No. 5
Lido
Staking ETH without running a validator.
Lido pools ETH from many users, stakes it through professional node operators, and gives back stETH, a token that tracks the staked ETH plus rewards and can still be used across DeFi.
Why it matters
It made staking accessible to people with any amount of ETH, and stETH became one of the most widely used assets on Ethereum.
What to watch
Liquid staking adds smart contract and operator risk on top of staking itself, and stETH can trade slightly away from ETH.
No. 6
Safe
The multisig wallet that guards many project treasuries.
Safe is a smart account that can require several signatures before any transaction goes through, for example two of three keys. Teams, DAOs and individuals use it so that one stolen key is not enough to move funds.
Why it matters
A large share of the value held by crypto teams sits in Safe accounts, and its contracts have been battle-tested for years.
What to watch
Multisig protects keys, not judgment. Signers still need to check exactly what they sign, since attackers have targeted signing interfaces.
No. 7
ENS
Readable names instead of long addresses.
The Ethereum Name Service maps names like alice.eth to wallet addresses, websites and profiles. Wallets that support it let you send to a name instead of a 42-character address.
Why it matters
Fewer copied addresses means fewer costly mistakes, and an ENS name works as a portable on-chain identity.
What to watch
Names expire if not renewed, and look-alike names exist. Double-check the exact spelling before sending.
Article archive
Ethereum project guides, self-custody notes and Web3 explainers. New articles every week.