A Bitcoin ETF settles a $50 million trade in minutes. A private equity fund-of-funds takes a decade to deploy capital. Both are "alternatives." Only one requires understanding cryptographic hashing, validator economics, and why a smart contract bug can destroy a billion dollars in seconds.
A distributed ledger is a database shared across multiple nodes with no central authority. A blockchain is a specific type of distributed ledger that records transactions in sequential, cryptographically linked blocks. Each block contains a hash of the previous block. Change one block and every subsequent hash breaks. That makes the chain tamper-evident.
All blockchains are distributed ledger technologies (DLTs). Not all DLTs are blockchains. The exam tests this distinction.
Blockchains can be permissionless (anyone can participate, like Bitcoin and Ethereum) or permissioned (access restricted to approved participants, like Hyperledger). Permissionless chains prioritize decentralization. Permissioned chains prioritize speed and privacy.
The blockchain trilemma. A blockchain cannot simultaneously maximize all three of decentralization, security, and scalability.
How a transaction is added. The network needs a way for you to prove you own an address without ever revealing the private key that controls it.
Common mistakes
- Confusing PoW attack threshold with PoS. A 51% attack on PoW requires majority hash rate. On PoS, consensus failure requires controlling 33% or more of staked value. Trap: selecting "51%" when the question specifies a PoS chain.
- Calling a centralized exchange DeFi. DeFi is decentralized and permissionless by definition. Coinbase and Binance are centralized intermediaries. Trap: "a centralized exchange that offers crypto lending" described as a DeFi protocol.
- Treating impermanent loss as always permanent. Impermanent loss only becomes realized if the LP withdraws while prices are diverged from deposit ratios. If prices return to the original ratio, the loss disappears. Trap: describing impermanent loss as "the guaranteed loss from providing liquidity."
Bottom line
- CAIA splits digital assets into four categories (Payments, Token Currencies, DeFi, Web 3.0). The blockchain trilemma allows only two of decentralization, security, scalability; public chains favor the first two, private chains favor scalability and control.
- PoW uses miners and a SHA-256 nonce hunt (Bitcoin). PoS uses validators and staked collateral with slashing (Ethereum). DPoS adds elected delegates for higher throughput at lower decentralization.
- Four stablecoin types: fiat-collateralized, crypto-collateralized, commodity-backed, algorithmic. Algorithmic is the riskiest (no collateral backstop). CBDCs are central-bank-issued, fiat-backed digital cash.
- DeFi spans six application categories (DEXs, oracles, lending/borrowing, insurance, yield farming, derivatives). DAOs govern protocols via governance tokens such as MKR or COMP.
Exam shortcut
When the exam asks which risk is unique to digital assets, the answer is always smart contract risk. When it asks the riskiest stablecoin, the answer is algorithmic (no collateral backstop). When it asks the PoW attack threshold, the answer is 51% of hash rate; for PoS, it is 33% of staked value. When it asks how many stablecoin types, the answer is four (fiat, crypto, commodity, algorithmic).
The full lesson (about 5,045 words, 34 min read) adds 2 worked examples, all 8 common mistakes, a self-check, free in the app.
Learning objectives
- dlt blockchains
- smart contracts defi
- bitcoin
- ethereum
- payments tokens
- defi web3
- institutional portfolios
- allocating
- modern portfolios
- risks challenges
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