Here are some legal ways to potentially make a significant amount of money:

1. Start a business. Launching a successful company, especially in high-growth industries, can generate substantial profits1.

2. Invest in stocks, real estate, or other assets. With proper research and strategy, investing can build long-term wealth1.

3. Develop high-income skills. Acquire expertise in fields like software engineering, data science, or management consulting to command high salaries1.

4. Create and sell online courses. Share your knowledge on platforms like Udemy or Skillshare to generate passive income5.

5. Become a freelancer or consultant. Offer specialized services in your area of expertise through platforms like Upwork or Fiverr2.

6. Start a YouTube channel or podcast. Build an audience and monetize through ads, sponsorships, and merchandise4.

7. Write and sell ebooks or other digital products. Self-publishing can be lucrative if you create valuable content5.

8. Participate in the gig economy. Drive for rideshare services, deliver food, or offer task services through apps like TaskRabbit2.

9. Flip items for profit. Buy undervalued items and resell them at a higher price on platforms like eBay or Amazon3.

10. Rent out property or assets. Lease spare rooms on Airbnb or rent out your car when not in use5.

Remember, most methods of making significant money require time, effort, and often some initial investment. It's important to research thoroughly, develop your skills, and be prepared for potential risks and challenges along the way.