Make money doing literally anything

Get obsessed with what you want to do in life. If you love Mathematics, become a Mathematician. It shouldn’t matter to you if it earns you a good living or not.

Whatever you do, do it the best way. You are paid for the service you give to the world. If you can provide solutions to the problems you love, you are qualified to earn money, a lot of it.

• Pick any skill
• Laser focus in on it
• Devote 4 hours a day
• Complete 10,000 hours to achieve Mastery

• do what you love
• do it in public
• gather an audience
• monetize it
• sell them a product

There are 8 billion+ people on this planet. At least 1,000 people have the exact same interests and conditions as you right now. 

Create the type of content you relate to. And since many people have same interests as you, they'll relate to your content and find it interesting.