Cold calling investors with a pitch is about as likely to get you funding as buying a lottery ticket. Sure, once in a while somebody will get lucky, but it's an astronomically unlikely scenario. The reality is that investors are highly unlikely to throw money at an idea from a person they've never met before who just randomly sent them an email with a pitch. They're much more likely to get a return investing in a business from somebody they know and have confidence in. You're far better off making a Kickstarter campaign for your idea than trying to pitch to an investor.