The length of time that passive income can last depends on various factors such as the type of investment, the performance of the investment, and changes in the market or industry. Some passive income sources, such as stocks or real estate investments, can potentially provide a stream of income for many years or even decades, while other sources such as royalties from creative works may have a shorter lifespan.

For example, a rental property can generate passive income for as long as it is rented out, while a patent for a new invention can generate passive income for a limited period, typically around 20 years. Additionally, changes in market conditions or the economy can impact the longevity of passive income sources, making it important to diversify and monitor investments regularly.

Ultimately, the duration of passive income will vary depending on the specific investment, its performance, and other external factors.

Here are some tips on generating passive income:

1. Invest in income-producing assets: Look for assets that generate income such as dividend-paying stocks, rental properties, and bonds. These assets can provide a steady stream of income without requiring active involvement.
2. Diversify your portfolio: Don’t put all your eggs in one basket. Diversify your portfolio by investing in different types of assets to reduce risk and increase your chances of earning passive income.
3. Reinvest your passive income: Reinvesting your passive income can help you generate more passive income in the long run. Instead of spending your passive income, consider reinvesting it in the same or other income-generating assets.
4. Be patient: Building a passive income stream takes time and patience. Don’t expect to earn a significant amount of passive income overnight. It’s important to have a long-term view and stay committed to your passive income strategy.
5. Stay informed: Keep up to date with the latest trends and news in the markets you are investing in. Stay informed about the performance of your assets and make adjustments to your portfolio as needed.