It Isn't The Idea, It Is The Execution
You ever see a new business open, or a new product that is on the market, and they are the hottest thing? Everyone is buying and talking about it and you start telling all of your friends how you had the idea already? You go to bed every night kicking yourself about how you didn't act on your idea earlier and what it could mean for you if you had.
Everyone is looking for the million dollar idea. You see something created and wonder why you couldn't come up with it yourself. The funny thing is it isn't the idea as much as it is the ability to act on it. Most ideas are generally available. Go on the Internet and a quick search will likely get you to the companies who already do what you are thinking of. That doesn't mean to abandon your idea, you just have to figure out how to execute in spite of the competition.
Stealing ideas is easy, stealing the execution of an idea is impossible. Similarly, as an individual nobody can steal your effort, preparation and drive. It might feel like you have a disadvantage, but you have the same 24 hours in a day as everyone else, what you choose to do with it is entirely up to you.