Well, He lies to hate bitcoin but bought a lot upon dips, banks don't declare war about bitcoin,
I don't read specifically to the statements of any banks that they will go war for Bitcoin or Crypto Currencies,
besides some of them are in interest to use blockchain technology to their businesses. The blog also exaggerate some things that the reason for BTC dips claimed on what dimon says, but in reality it is also the effect of segwits and china's Banning ICO.