This will depend on several factors, such as:

1. Comparison with the Market

- Compare the offered APR with average rates from other similar platforms or projects.

- Very high rates may indicate greater risk or potential fraud.

2. Risks Involved

- Trusted platform: Make sure the exchange or protocol offering the APR is safe and legitimate.

- Currency volatility: Even a high APR may not compensate for losses in cryptocurrency value due to its volatility.

3. Sustainability of APR

- Check how the APR is financed. If the project relies solely on new participants to maintain rates, it may be unsustainable.

- Evaluate the project whitepaper and the viability of the business model.

4. Liquidity and Fund Blocking

- Some platforms require you to lock your funds for a period of time, which may limit your ability to react to market changes.

- Check if the APR justifies this limitation.

5. Real Income Calculation

- Confirm whether the APR is based on simple or compound interest, as this impacts actual returns.

- Also consider additional fees such as transaction, withdrawal or conversion costs.

A good APR balances return and risk, and is offered by a reliable platform and backed by solid fundamentals. Be wary of excessively high APRs, especially above 100%, as they may be signs of high risk or unsustainable practices.