Sell 1 million products at $1 a piece
Sell 100000 products at $10 a piece
Sell 10000 products at $100 a piece
Sell 1000 products at $1000 a piece
Sell 100 products at $10000 a piece
Sell 10 products at $100000 a piece
Sell 1 product at $1000000 a piece
Simple and easy

Can you guess why it is so hard to make your first million ?
I think it would not be that easy because even I have a hundreds of products that has a million dollar price, I can't be so sure that I sell all of them and earn millions of dollar within a day. Earning money is not that easy, that is why it is very hard to be a millionaire because it takes time for you earn good profit in your business.