You need one of six things to make a lot of money.
1. A special or unique skill, that's also in demand
2. An incredible work ethic
3. A patent
4. A reputation for being the absolute best at something
5. A cornered market
6. A good, new idea
If you make a lot of money using any or all of these skills, the market will respond, and attempt to lower your ability to earn. So you have to adapt, like The Borg in Star Trek.
NATURE ABHORS A VACUUM. MONEY MAKING OPPORTUNITIES ARE THE ABSOLUTE DEFINITION OF THE WORD VACUUM.
