Get 1 dollar from 1 million people?

You can:

Develop a mobile application that would charge $1 dollar for signing up or for some particular service. It can be an Internet game or a useful application that solves particular problems.

The Candy Crush studio has revealed its latest financials, which show that annual profit for 2015 dropped by a tenth to land at $517 million. Meanwhile, revenues were down 12 per cent to $2 billion. Total gross bookings were also lower, falling 10 per cent to $2.1 billion.

However, Candy Crush Saga is among top 10 most profitable mobile games, but yours does not necessarily need to reach that far.

Develop an online platform that connects people and charge a percentage from their transactions. For example, it may be an Internet shop, freelance job platform, stock trading platform, etc.

Develop a popular advertising platform where companies and private faces would display their services.

Start a public transport network in a big city with a population of more millions.

Come with a great idea and start a campaign by asking for funds from those who might be interested in the final product. This is called crowd-funding and it becomes very popular on the Internet.

There are popular platforms where you can start your crowdfunding campaign.

There are probably many more methods, but you have to believe in it, have a great idea, and just act.

I hope this helps!