There is something many people don't quite understand when they enter the world of crypto investing: the difference between just looking at the nominal rate and truly understanding how much they will earn. That’s where APY comes in.

Look, when you seek returns in crypto, most people see a number and move on. But APY shows you the full picture because it includes compound interest. That is, earning interest on what you’ve already earned. It sounds simple, but it changes everything.

Let’s consider a concrete example: if you see an opportunity with an APR of 2% versus an APY of 3%, that 1% difference is not a mistake. It’s the power of compounding working for you. With APY, that extra 1% is generated automatically when you reinvest your earnings.

The technical formula is APY = (1 + r/n)^(nt) - 1, where r is the nominal rate, n is how many times it compounds per year, and t is the time. But the reality is that in crypto, this gets complicated because market volatility, liquidity risks, and smart contract risks come into play. It’s not the same everywhere.

Where you see APY in crypto is mainly in three places: crypto loans where you lend and earn interest, yield farming where you move assets between platforms seeking the highest returns (though beware, risks can be high especially on new platforms), and staking where you lock up your crypto on a blockchain network. In staking, you generally see more attractive APYs, especially on proof-of-stake networks.

Now, although APY is a key metric for evaluating opportunities, it’s not the only thing that matters. Each type of investment carries its own risks and advantages. Before putting money in based solely on APY, consider market volatility, your risk tolerance, and whether you really need that money locked up. Compound interest is powerful, but only if you understand where you’re putting your capital.