A market-tracking app called Trigger has already set up an alert that responds whenever Trump tweets about publicly traded companies.
Trump's account has been hacked before...
Someone with improper access to Trump's account could accomplish their goals while staying in character as Trump...
For illustration purposes only, Trump never said this, I mean on Twitter:
I don't know who wrote this, I just found it lying around on the internet...
"In-character" messages such as the above could easily be confused with real messages like this one:
This was all predicted. By the same guy who gave us Beavis and Butthead to move devolution forward by about 500 years:
"The bombs are dropping right now, bitchez. Get me some of that Lockheed Martin!!!"
