The Dragon has been my semi-bluff for decades. Only one opponent ever dared to play 9. Bc4 against me in a tournament game and won of course. Instead of the official refutation I had to deal with 9. 0-0-0 in pretty much every game, and even though this line was regarded as rather harmless at the time, it always gave me lots of headaches. That is why I eventually switched to the Accelerated Dragon.
Recently I decided to check my old analysis with modern engines and the result was quite surprising: While the Dragon doesn’t have much upside anymore, it is still very playable, even in 2017! Nakamura seems to share this opinion.