I do think Trump is all bluster, but hopefully for the sake of world peace, the secret service takes his twitter away.
Trump is 90% hot air as you say. His ability to change the media focus when he has real issues put against him is extraordinary.
This doesn't sound like a very good trait to have if you use it for negative purposes, such as to avoid being scrutinized for the stupid stuff one says, does or thinks.
I think being able to outsmart the media is a completely necessary trait in 2017.
Trump just says "Media crap" and everyone buys it regardless of the truth.
Why?
Because most people are now aware how fake news actually is. CNN. FOX. They are merely puppet-ed infotainment, at best. So Trump calls each media story "lies" and people agree. Trump is their insider in the system they dont trust.
Donald knows all news is fake.
Checkout the Pakistani foreign minister threatening Israel on Twitter.
http://www.watoday.com.au/world/fake-news-prompts-pakistani-nuclear-threat-aimed-at-israel-20161225-gthq1s.htmlTwitter is going to start a nuclear war regardless of Trump.