Economists say small-business owners — especially farmers dealing in high volume and low profit margins — are more likely to accept a volatile currency like Bitcoin than bigger businesses. Allen Sheffield/Flickr hide caption

itoggle caption Allen Sheffield/Flickr

On a corner in Washington, D.C., where stores burned during riots 44 years ago, there's now a plaza where farmers sell produce on Saturday mornings. Dan Charles/NPR hide caption

itoggle caption Dan Charles/NPR

Georgia O'Neal harvests winter greens at the Tree and Leaf Farm in Unionville, Va., on March 16, 2011. Maggie Starbard/NPR hide caption

itoggle caption Maggie Starbard/NPR