The German radio host made the comments while talking about the band's cover of a Coldplay song.
Read moreBTS
By Mark Savage
BBC music reporter
By Mark Savage
BBC music reporter
By Mark Savage
BBC music reporter
Video content
Video caption: BTS - from chart success to stock market gold? BTS is one of the world's biggest bands. Now the company behind them is headed for the stock market.
By Tim McDonald and Won Jung Bae
BBC News
By Danai Howard
BBC News
By Laura Bicker
BBC News, Seoul
By Mark Savage
BBC music reporter