Why is "District of Columbia and United States Territories quarters" trending?

Wikipedia Overview

The District of Columbia and United States Territories quarters were a series of six quarters minted by the United States Mint in 2009 to honor the District of Columbia and the unincorporated United States insular areas of Puerto Rico, Guam, the United States Virgin Islands, American Samoa, and the Northern Mariana Islands. The islands commonly grouped together as the United States Minor Outlying Islands were not featured, as the law defined the word "territory" as being limited to the areas mentioned above. They followed the completion of the 50 State Quarters Program. The coins used the same George Washington obverse as with the quarters of the previous 10 years. The reverse of the quarters featured a design selected by the Mint depicting the federal district and each territory. Unlike on the 50 State quarters, the motto "E Pluribus Unum" preceded and was the same size as the mint date on the reverse.