BTS is marking a decade since their debut and there are several reasons why the seven-member boy group have been topping charts since they rose to global fame. Major landmarks in Seoul will turn purple this month in celebration of the 10th anniversary of the BTS' debut. While many K-pop groups have now become famous, BTS is in a league of its own. The septet is made of incredibly talented singers and dancers, but they are known for so much more.