The scenario that, to my mind, makes the most sense of the given facts and requires the fewest fantastical leaps is that, a decade or so ago, Trump, naïve, covetous, and struggling for cash, may have laundered money for a business partner from the former Soviet Union or engaged in some other financial crime. This placed him, unawares, squarely within sistema, where he remained, conducting business with other members of a handful of overlapping Central Asian networks. Had he never sought the Presidency, he may never have had to come to terms with these decisions. But now he is much like everyone else in sistema. He fears there is kompromat out there—maybe a lot of it—but he doesn’t know precisely what it is, who has it, or what might set them off.
From the referenced article; I believe this to be the real situation with Trump. He does not know exactly what the kompromat is. It obviously is not anything related to sexual depravity, affairs or anything related to female relationships since his cult doesn't care what he does with his pants down and he cannot be embarrassed with sexual misconduct. Make no mistake, he is under the control of Putin and possibly many others.