You might not need cash for as many things these days, but there are still reasons to carry a small bit of change on your person when you're out and about.

Some small, locally owned businesses will only accept cash, or they'll charge a service fee for using a card. Certain farmers markets, smaller paid parking lots and events vendors usually require cash, too.

While there are advantages to having some cash in your wallet or purse, it's not always the safest option. A recent study from The Stock Dork analyzed top U.S. cities to figure out which ones were the most dangerous to keep cash in.

Keep reading for a closer look at the results and some tips for keeping your money safe.