You can't trust anyone with intellectual property. If your concept is truly novel, anyone you show it to needs to sign a NDA (non-disclosure agreement).

From there, depending on the product, you want to document and date the invention by applying for patent pending status with the USPTO (United States Patent and Trademark Office).

You'll need an intellectual property or patent attorney to do this correctly.

If you're bootstrapping and low on cash, you're going to need to find an angel investor who can fund this.

The easiest way to get VC funding is to put together a professional prospectus and presentation and then present the product (after execution of NDAs) to companies with similar or complementary product lines.

Once you have legitimate interest from a company, you can easily get VC funding if necessary.

Alternatively, you can always go the crowdfunding route with something like Kickstarter.