... with how I earn my living online. If I couldn't think of something, I would choose a topic that's hot right now, like real estate investing or making money online. I would then ... with that $100, you can only use $200 of that money to get to the next step. What you do with the rest of the money is up to you. Here are the money steps to follow. 1. $100 2. $200 3. ... over the limit. Never ever use money from your own bank account otherwise you will be more fearful of losing the money. I think the best way to double your money would be to buy larger items...