What is BTS' most fundamental song?

There's a lot. But I personally think it's Mic Drop.

instiz 

-I Need U

-Spring Day

-Run

-Fire

-IDOL

-Dope

-No More Dream for me

-Not Today

-Blood, Sweat, and Tears

-Boy in Luv

-DNA

-Mic Drop

-Attack on Bangtan

-No one has the same opinions?ㅋㅋㅋㅋㅋ