Modulis 0 · Crypto basics

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Why DeFi Instead of a Bank?

A bank in Europe pays 1–3% per year. The same money working in DeFi protocols behaves very differently. Where does that gap come from? Behind it is a simple, logical mechanism — and once you understand it, you'll be able to judge any offer yourself instead of trusting it blindly. Let's start with the basics.

First — where DeFi stands among other ways to invest

Before going deeper, it helps to see the full picture:

Asset	Annual return	Risk	Liquidity	Minimum investment
Bank deposit	1–3%	Very low	Medium (term deposit)	€1
Real estate (rental)	4–7%	Medium	Very low (months)	€50,000+
Stocks (ETFs)	7–10% (historically)	Medium	High (1–3 business days)	€10
Bonds	3–5%	Low	Medium	€1,000
DeFi Lending	5–8%	Medium–high	Very high (seconds)	$10
DeFi LP	20–60%	High	Very high (seconds)	$50
DeFi Strategy B	6–9% (with hedge)	Medium (protected)	High	$1,000+

(All positions in Lithuania are subject to 15% GPM — Lithuania's personal income tax — on realized profit; see lesson 2-8.)

Why is DeFi's return higher than a bank's?

Three specific reasons drive the higher return:

No middleman. A bank pays you 2%, but earns 6–10% from your money itself. A DeFi protocol has no employees, offices, or advertising — so more stays with you.
Risk premium. A higher return reflects a specific risk (smart contract bugs, liquidations, IL). You get paid for that risk — it's not a penalty, it's compensation. How to manage it — below and throughout the course.
The crypto market is young. Too little capital, too much demand = high yields. This will shrink over time, as it did with P2P lending (used to be 15%, now 5%).

How to read these numbers

A 48% APR isn't a fixed return — it's a fluctuating fee-earning rate: one week it might be 80%, the next 10%. An experienced investor looks at a big number not with excitement, but with a question: "how much of it is left after everything?" In our Strategy B, after options costs and debt costs, what's actually left is ~6–9% per year — similar to a good stock, but with instant liquidity. Learning to read the real number is one of the most important skills in all of DeFi.

APR vs APY — what's the difference?

Two words that sound alike but mean different things.

APR (Annual Percentage Rate)

APR — simple interest per year. If you have $10,000 at 6% APR, you'll get $600 over a year. The interest doesn't compound.

Profit = Capital × APR × Time → $10,000 × 0.06 × 1 = $600

APY (Annual Percentage Yield)

APY — what you actually earn when the profit is added back to the balance and starts working too.

APY = (1 + APR / n)^n − 1 (n = how many times per year the profit compounds)

The compounding effect — like a snowball

Picture rolling a snowball down a hill. The longer you roll it, the bigger it gets — new snow sticks to what's already there. It's the same with money: profit gets added to the balance, and next month it's calculated on a bigger amount.

Example with $10,000 and 48% APR (an illustrative, conservative assumption — LP fee APR fluctuates, typically ~20–60%):

Simple interest (APR): $10,000 + $4,800 = $14,800
Compounding monthly (APY): $16,010
Compounding daily (APY): $16,160

A difference of $1,360 — just from the profit "working" alongside your money.

Where you hold it	APR	Compounds	APY	Profit from $10,000
Bank (EUR)	2%	Monthly	2.02%	$202
Kamino lending	6%	Monthly	6.17%	$617
Orca LP fees	48%	Weekly	61.2%	$6,120
Deribit ad premium	15%	Every 120d	15.8%	$1,580

Where does DeFi's return come from?

DeFi protocols have no buildings, employees, or bureaucracy, so the profit comes straight to you from three sources:

Lending — ~6% APY · Kamino, Aave You lend your SOL or ETH to others. They pay interest directly to you — no middleman.

LP fees — 20–60% APR · Orca, Meteora You "deposit money" into a trading venue. Everyone who swaps currencies pays a small fee, and it goes to you.

Options premium — 10–20% APR · Deribit You sell "insurance" to other market participants and get paid for taking on the risk — similar to an insurance company.

Risk premium — your thinking tool

A higher return always reflects a specific risk. This isn't a warning, it's a tool: you see a big number → you ask "what risk am I being paid for here?" This one question will protect you better than any "be careful." Specific risks and how to manage them — at the end of the lesson.

Smart contract — where did the middleman go?

In the traditional world, every transaction needs a middleman. In the DeFi world, a program does that job.

Smart contract — like a vending machine

You put in a coin, press a button, get a candy bar. Nobody can cheat you — the machine works by its programmed rules. A smart contract works exactly the same way, just with money: it executes the rules automatically, and no one can bypass or secretly change them — every change is visible on the blockchain.

Example with Kamino:

You deposit SOL into Kamino's smart contract.
It automatically lends your SOL to others.
Others pay interest — the contract automatically passes it on to you.
If a borrower's collateral value drops too low, the contract automatically sells their collateral to cover the debt.

Even the Kamino team can't "take your money." A smart contract removes the middleman — which is exactly why it matters to only choose long-running, audited protocols. How to pick them — in lesson 1-4.

Bank vs DeFi — full comparison

What matters	Bank	DeFi
Annual earnings	1–3%	6–48%+
Is your money insured?	Yes (up to €100k)	No
When can you use it?	Business hours	24/7
Do you need paperwork?	Yes	No (only when buying crypto)
Withdrawing funds	1–3 business days	1–60 sec
Who controls the money?	The bank	You
Can you see what's happening?	No	Yes (everything public)
Minimum amount?	Often 1,000+ EUR	From $1

A bank suits everyday transactions and safe savings (with deposit insurance). DeFi suits people who want to actively manage their own money and understand what they're doing. It's not a "better bank" — it's a different system with different rules. Our goal is to help you understand them.

How this fits into the DeFi Risk OS platform

Strategy A — Covered Call + LP: lending ~6% APY + LP fees 20–60% APR + options premium 10–15% APR.

Strategy B — Multi-Layer Yield: a 3-layer system, several income streams stacked on top of each other, ~6.4% APR from the yield component alone, 64% of the portfolio protected by options.

Risk and how you manage it

Smart contract bug → only use long-running, audited protocols (Aave, Kamino). How to check — lesson 1-4.
Price drop / impermanent loss → that's why the strategy includes options protection (hedge); the LP position is built deliberately, not blindly.
Fluctuating return → plan around a realistic ~6–9% after costs, not the 48% headline.
Liquidation (when borrowing) → keep a safe LTV; more on this in Module 3.

Every risk has a specific lever. You don't ignore it and you don't fear it — you manage it.

Summary

APR = simple interest. APY = with the compounding effect (profit on profit).
A bank pays 1–3% because it keeps most of the profit for itself (and is insured).
DeFi pays 6–48%+ because there's no middleman — but the return comes with a specific, manageable risk.
Risk premium — your tool: a big number → the question "what risk am I being paid for?"
After this lesson, you can already read any "APR" yourself and understand where it comes from.

Quick check

What's the difference between APR and APY?

Practice task

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Compare a bank and DeFi using real numbers

In this lesson you saw a bank vs DeFi table. Now gather today's numbers from both worlds yourself — it takes about 7 minutes, nothing to buy.

This is learning, not investing — use only small amounts you treat as tuition.

You just compared a bank and DeFi with today's actual numbers and saw the risk premium with your own eyes — most people who talk about crypto have never done that. This is the foundation the rest of the course stands on.

Next step: you now understand where DeFi's return comes from and how to read it. In the next module we move to practice — your first exchange and first purchase, step by step.

Crypto in a Portfolio