You'll have to excuse SA, he confuses saying dumb shit outloud with unpredictability.
Take Trump's stance on Russia. Everything he says and does regarding Russia has been 100% predictable for nearly a decade. Should he be elected president again, we all know 100% what he will do regarding Ukraine.
Or North Korea. Trump is all about making a spectacle. Meeting with the other fatass at the DMZ, again, 100% in line with Trump's self promoting attitude. Nothing of substance actually came of it, but that didn't matter.
How about Iran? Everyone knew Trump would pull out of the nuclear deal. Did he replace it with anything? Did Iran bend to his will? No? Oh, must have been all that unpredictability.